Arrange the following elements in order of increasing ionization energy
Picture of elements included.
Answers
Ionization Trend: First ionization energy will increase left to right across a period and increase bottom to top of a family (column).
A) Sr, Be, Mg are all in column 2 of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Be, Mg, Sr
B) Bi, Cs, Ba are all in the same row of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Bi, Ba, Cs
C) Same rule as above. Order is: Na, Al, S
The elements in increasing order of ionization energy will be:
a) Be, Mg, Sr
b) Bi, Ba, Cs
c) Na, Al, S
Ionization energy trend:Ionization Trend: First ionization energy will increase left to right across a period and decrease bottom to top of a family (column).
A) Sr, Be, Mg are all in column 2 of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Be, Mg, Sr
B) Bi, Cs, Ba are all in the same row of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Bi, Ba, Cs
C) Similarly, Order is: Na, Al, S
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Related Questions
I need help on Chemistry?
ANYONE PLEASE?
Answers
Answer:
1. 1g/ml
Explanation:
1. Density is mass divided by volume (g/mL).
10g/10mL = 1 g/mL
2. When you already know the density and the volume, you can use the density as a unit converter.
[tex]5mL*\frac{20g}{mL} = 100g[/tex]
3. It's the same with density and mass.
[tex]20g*\frac{1mL}{5g} = 4mL[/tex]
1. An atom has 57 neutrons and 42 protons. How many electrons will this atom have if it
neutral?
57
44
42
40
Answers
Answer:
42
Explanation:
Because the proton number or atomic number is equal to electron number.
Answer:
42
In order for it to be neutral there must be the same amount of protons and neutrons
Have a nice day! :)
Write the principle of separation of mixture.
Answers
Explanation:
Mixtures can be separated using a variety of techniques. Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material.
An acid-base reaction of (r)-sec-butylamine with a racemic mixture of 2-phenylpropanoic acid forms two products having different melting points and somewhat different solubilities. Draw the structure of these two products. How are the two products related? Be sure to answer all parts.
Answers
Answer:
See explanation
Explanation:
When an optically active compound reacts with a racemic mixture, two different products appear .
Hence, when (R)-sec-butylamine reacts with a racemic mixture of 2-phenylpropanoic acid as shown in the image attached.
Enantiomers are optical isomers which are mirror images of each other. The image attached was obtained from Bartleby.
Consider the reaction below. 2 Upper N Upper H Subscript 3 (g) Baseline double headed arrow Upper N Subscript 2 (g) Baseline + 3 Upper H Subscript 2 (g). What is the most likely effect to the forward reaction if there is an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases. The reaction is not affected at all. The reaction stops completely.
Answers
Answer:
The increase in pressure of the reacting system will increase the formation of NH₃
Explanation:
The given parameters are;
2NH₃ (g) ⇄ N₂ (g) + 3H₂ (g)
The number of molecules in the reactant side of the equation = 2 molecules
The number of molecules in the product side of the equation = 1 + 3 = 4 molecules
Avogadro's law states that equal volume of all gases at a given temperature and pressure contains equal number of molecules
Therefore, given that the number of molecules of the product are twice the number of molecules of the reactant, the volume of the product is twice the volume of the reactant
If the pressure is increased, at constant temperature by Boyles law, the volume will be reduced, favoring the formation of the low volume occupying NH₃
Therefore, the reverse reaction (formation of NH₃) will preferably occur.
Answer:
The answer is B
Explanation:
The other answer is incorrect. The correct Answer is B
Trust Me
Can someone please help me with a science question?????
Answers
Answer:
yes
Explanation:
Please help will give brainliest
Answers
6 g/cm³
Explanation:Hi there !
density formula
d = m/V
V = 33.0ml - 25.0ml = 8.0 ml = 8 cm³
m = 48.0 g
replace
d = 48g/8cm³ = 6 g/cm³
Good luck !
1. Compare and contrast the characteristics of metals and nonmetals.
2. Describe the electrochemical series and why it’s important in understanding metals.
3. Describe the theory of ionization in regard to acids and bases.
4. Identify the role of indicators.
Answers
Answer:
1. Both metals and nonmetals are types of elements and can be involved in chemical reactions. Some of their differences are highlighted in the chart below.
Metals:
Appearance; Shiny.
Conduct heat or electricity; Yes.
Malleable or ductile; Yes, both and has great mechanical strength.
Form stable compounds; Forms stable compounds with acids; also forms oxides; replaces hydrogen in acids or water; combine with nonmetals; often becomes positive.
Nonmetals :
Appearance; Not shiny .
Conduct heat or electricity; Not well .
Malleable or ductile; Brittle and not easily molded into shapes .
Form stable compounds; Oxides usually give acid reactions in water; often becomes negative
2. The electrochemical series is an arrangement of metals in such order that any metal in the list is displaced from its compounds by any metal above it, but displaces any metal below it. The higher up the list a metal is, the greater its activity. Knowing a metal’s placement on this chart can help you understand the activity of the metal, especially in regard to its ability to displace hydrogen in acids. Any items on the list far above hydrogen will do a good job at displacing it, those near it won’t do such a good job, and those below it won’t displace it from acids at all.
3. When placed in water, acids dissociate and form free hydrogen ions, which determine the properties of acids. The number of hydrogen ions determines the strength of an acid. Strong acids dissociate to a large degree and produce a large number of hydrogen ions. Weak acids dissociate to only a slight degree.
When placed in water, bases dissociate and form free hydroxyl ions, which determine the properties of bases. Strong bases dissociate to a great degree and produce a large number of hydroxyl ions. Weak bases dissociate to only a slight degree.
When free hydrogen ions and free hydroxyl ions are removed from solutions of acids and bases, then the acidic and basic properties disappear. This is what happens when acids and bases are mixed together in proper proportion; the hydroxyl ion will unite with the hydrogen ion to form water. The resulting salt product is neutral.
4. Indicators are used to help determine the pH value of an unknown solution. These are often papers that turn a certain color at certain pH values.
Metals are good conductors of heat and electricity but the non-metals are not.
Compare metals and non-metalsMetals are good conductors of electricity and heat whereas non-metals are poor conductors of heat and electricity. Metals have high density while on the other hand, non-metals have low density. Metals are malleable and ductile whereas non-metals are brittle.
So we can conclude that metals are good conductors of heat and electricity but the non-metals are not.
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Which molecules of the following gases will
have the greatest average kinetic energy?
1. N2 at 1 atm and 298 K
2. CO2 at 1 atm and 298 K
3. H2 at 0.5 atm and 298 K
4. He at 0.1 atm and 298 K
5. All of the molecules have the same kinetic
energy
Answers
Answer:
.
Answer: 5 All of the molecules have the same kinetic energy
since the temperature is kept constant at 298 K
Explanation:
The AVERAGE kinetic energy is directly proportional to the absolute temperature.
All the molecules have the same average kinetic energy as average kinetic energy is directly proportional to the absolute temperature. So, the correct option is 5.
What is average kinetic energy?
The average kinetic energy (K) is equal to one-half of the mass (m) of each gas molecule times the root mean square speed (Vrms) squared.
We know that the average kinetic energy is directly proportional to the absolute temperature.
All of the molecules have the same kinetic energy since the temperature is kept constant at 298 K.
Therefore, All the molecules have the same average kinetic energy as average kinetic energy is directly proportional to the absolute temperature.
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What is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Answers
Answer:
c. .....................
Answer: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Your carbon footprint is the amount of carbon dioxide and other carbon compounds emitted, because of your use of fossil fuels.
Hope this helps!
You just got a free ticket for a boat ride, and you can bring along
2 friends! Unfortunately, you have 5 friends who want to come along.
Answers
Answer:
10
Explanation:
Khan Academy
Which best explains how photosynthesis is helpful to humans? OIt reduces the amount of harmful rays released by the sun. O It increases the levels of carbon dioxide in the air. O It provides oxygen for humans to breathe. OIt produces proteins, which humans can eat.
Answers
Answer:
C. sorry i am late :)
Explanation:
During photosynthesis, plants intake carbon dioxide from the air and releases oxygen. Thus, they are providing enough oxygen available for humans to breath.
What is photosynthesis?Photosynthesis is a bio-chemical process by which green plants produces chemical energy with the aid of light energy absorbed by chlorophyll. Photosynthetic reaction is the combination of carbon dioxide and water giving molecular oxygen and glucose.
Through photosynthesis, the amount ox oxygen and carbon dioxide in the atmosphere is balanced. This balancing cycle involves respiration of animals also.
The carbon dioxide that we exhale are up taken by plants and converts to oxygen gas. This makes sufficient oxygen for all animals to breath. Therefore, photosynthesis is a stage in carbon cycle and oxygen cycle.
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Does anybody understand this I’m stuck
Answers
Answer:
it's the first one
Explanation:
can you help me too
Use the following Information to answer question 10.
DDT is a pesticide that farmers used to spray on their crops to ward off insects.
Unfortunately, once DDT is released into the environment, it does not break
down. Because of this, DDT can spread as shown in the example below,
Crop
Insect
Bird->
Falcon
10. In this example, as the DDT passes along up the food chain, the concentration of
DDT would:
a gradually decrease
b. gradually increase
c. remain the same
d. decrease then increase
Answers
Answer:
c. remain the same
Explanation:
Since DDT is persistent and does not break down when release into the environment, it is expected that its concentration as passes along the food chain will likewise persist.
If a substance is non-biodegradable, when it enters the body system or any living tissue, it passes on as waste. Such matter is not broken down or transformed into another type. Over many years, it will remain as it is. We can picture this problem by using non-biodegradable plastics. They remains just the same in the environment.pls help ill mark as brainliest :)
Q7. Pb + O2 PbO2
Is this combustion, single replacement, double replacement, synthesis, or decomposition
Answers
Answer:
This is a synthesis reaction.
Explanation:
Two elements are bonded together to form (synthesize) a new compound.
what does it mean if elements are in the same group on the periodic table?
Answers
Answer:
mostly metals
Explanation:
just learned
which balances the equation Mg + O2 → MgO
Answers
Answer:
2Mg+[tex]O_{2}[/tex]→2MgO
Explanation:
The first step is magnesium + oxygen equals magnesium oxide
The second step is changing that into an equation which looks like Mg+[tex]O_{2}[/tex]→MgO
The third step is to 2*Mg and 2*O as well as the product has to be 2*Mg,2*O which gets the equation to become balanced as 2Mg+[tex]O_{2}[/tex]→2MgO
The coefficient 2 balance the given reaction. The balanced equation for the given reaction is given as [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
A balanced equation is a mathematical representation of a chemical reaction that respects the law of mass conservation. It depicts the reactants and products of the reaction, as well as the relative amounts of each species. The unbalanced equation is [tex]\rm Mg + O_2 \rightarrow MgO[/tex]. One magnesium (Mg) atom on the left side and one on the right side, so the magnesium is already balanced. Balance the oxygen (O) atoms. On the left side, there are two oxygen (O) atoms present in the O2 molecule. On the right side, there is only one oxygen (O) atom in the MgO molecule. To balance the oxygen atoms, we need to add a coefficient of 2 in front of MgO: [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex]. The balanced equation is [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
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14. How do you describe an atom in which the number of protons is equal
to the number of electrons?
Answers
Emma wants to go swimming the first day the pool opens in May, but she is worried it will be too cold since summer only just started. She only likes to swim in the water if the pool is at least 82°F. The thermometer in the pool reads 24°C. Is the pool warm enough for Emma to swim in? Show all work to support your answer.
Answers
Answer:
the water is not warm enough for her
Explanation:
Given that
Her preferred temperature = 82°F
Thermometer in water reads = 24°C
Convert the preferred temperature to °C
°C=5/9 (82-32)
°C = 27.8 °C
Hence the water is not warm enough for her
The water is not warm enough for her to swim in.
She loves to swim in water at temperature = 82°F.Thermometer in water reads = 24°C.We have to convert Emma's preferred temperature to °C
°C= 5/9 x (F - 32)
°C=5/9 (82-32)
°C = 27.8
Therefore the temperature is 27.8°C
This means that the temperature of the water is not warm enough for her
to swim in.
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Why is it easy for some elements to lose electrons and harder for others?
Answers
Answer:
The further away electrons are from the nucleus the easier it is for atoms to use electrons.
Explanation:
If air temperature decreases, then
wave height will decrease
ocean temperature will also decrease the same amount
ocean temperature will also decrease, but not as much
ocean temperature will also decrease, but a greater amount
wave height will increase
Answers
Answer:
ocean temp
Explanation:
If air temperature decreases, then wave height will decrease and ocean temperature will also decrease, but not as much.
What is ocean temperature ?The water's temperature at the surface is known as the ocean surface temperature. Depending on the measuring technique, the term "surface" might signify anything from 1 millimeter to 20 meters below the sea's surface.
Due to changes in solar radiation and the physical characteristics of water, the temperature of ocean water fluctuates depending on location, both in terms of latitude and depth.
Water contracts and gets denser as it cools. The density of water is influenced by temperature and salinity, and as a result, water moves up or down through the ocean's strata and circulates as currents.
Thus, option B is correct.
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the percent composition of calcium is ?
Answers
Answer:
36%
Explanation:
This is the answer on edmentum/plato. Hope this helps. Jesus loves YOU!
Two liters of hydrogen gas are stored at a
pressure of 100 kPa. If the temperature
does not change, what will the volume
of the gas be when the pressure is
decreased to 25 kPa?
Answers
Answer:
the volume will expand
Explanation:
gas under pressure contracts, and expands with a lesser pressure
The volume of the hydrogen gas at 25 kPa is 8 Liters.
Explanation:
Given:
At constant temperature, 2 liters of hydrogen gas at 100kPa pressure.
To find:
The volume of the hydrogen gas at 25kPa.
Solution:
The initial pressure of the hydrogen gas =[tex]P_1=100 kPa[/tex]
The initial volume of the hydrogen gas at 100 kPa =[tex]V_1=2 L[/tex]
The final pressure of the hydrogen gas =[tex]P_2=25 kPa[/tex]
The final volume of the hydrogen gas at 25kPa = [tex]V_2=?[/tex]
Using Boyles law:
[tex]P_1V_1=P_2V_2\\100kPa\times 2 L=25 kPa\times V_2\\V_2=\frac{100 kPa\times 2L}{25 kPa}=8L[/tex]
The volume of the hydrogen gas at 25 kPa is 8 Liters.
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Jamal is 8 miles away from his house. He rides his bike home toward home at a speed of 12 mph..
How far away from home is he after a half hour?
Answers
Answer: 2miles
Explanation:if he’s going 12 miles in one hour, in half an hour he would’ve made it 6 miles. 8-6=2
Answer: b. 2 miles
Explanation:
PLEASE HURRY WILL GIVE BRAINLIEST
Click Oil Basics and use the information to complete this passage that discusses how plastic production affects society.
The production of plastics makes life
{answer} , so it benefits society. On the other hand, the production of plastics causes air and water {answer} , so it also harms society.
Answers
Answer:
easier and pollution
Explanation:
I just had this question and got it right
According to Maslow's hierarchy of needs, the basic needs are what we call physiological or biological needs. The survival of the individual relies on these basic needs. Looking at it this way, before you can meet any of the needs going up the hierarchy, one needs to be healthy or at least functional optimally to even get started. All other needs are considered secondary until the basic needs have been me
Answers
Answer:
True
Explanation:
|ndeed, Psychologist Abraham Maslow's sought to describe hierarchy in which the average (or most) humans place their needs. In other words, he believes we as humans have basic needs which we long to satisfy.
On the ranking or hierarchy, according to Maslow the need humans satisfy first is their physiological need. Here's the full hierarchy:
Physiological Needs
↓
Safety Needs
↓
Love/Belonging Needs
↓
Esteem Needs
↓
Self-Actualization
One hundred students were surveyed about who they would vote for. What is
the best way to display the results? Explain your answer.
Answers
What phenomenon does the Coriolis effect arise from?
Answers
Answer:
because our planet is spinning
which means the objects near the equator are moving at much faster velocities than objects at higher latitudes
I hope this helps✌
Which statement best defines potential enregy?
A. Potential energy is stored energy.
B. Potential energy is energy that can change over time.
C.Potential energy is the energy of motion.
D. Potential energy is the type of energy a roller coaster uses.
Answers
Answer:
A. Potential energy is stored energy
Explanation:
Answer:
A
Explanation:
i have the same question
TIME FOR SOME MORE STUPID QUESTIONSSSSS lol
What color is glass o.o
Answers
Answer:
ORANGE WAIT NO IM COLOR BLIND
Explanation:
Fish
Explanation