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Angelina_Jolie [31]
3 years ago
15

15 points for only two question :) please help

Chemistry
1 answer:
vodomira [7]3 years ago
8 0
Ionization energy increases as you move left to right in a period . that's why noble gases have high ionization energies.
shielding effect increases from top to bottom in a group atomic size also increases from top to bottom in a group
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V1..0
Mars2501 [29]

Are spotted cats cuter than solid-colored cats?

4 0
3 years ago
The concentration of hydroxide ions is greater than the concentration of hydronium ions for acidic solutions.
Katena32 [7]

Answer:

True

Explanation:

It's true because the pH is a measure of how basic or acid a solution is. In an acidic medium, the pH scales goes from 0 to 7. While in a basic medium goes from 7 to 14. The lower the pH value of the most acid the solution is.

1. The expression pH = -log(molar concentration of hydronium) allow to calculate the pH of a solution.

2. On the other hand, the expression pOH = -log(molar concentration of hydroxide) allow to determine the pOH of a solution.

The values of pH and pOH always obey the following expression:

pH + pOH = 14

Thus if for instance the pH becomes smaller the pOH must become bigger in order to fulfill the equation. Which means that the concentration of hydronium ions is greater than the hydroxide concentration.

For example, in an acidic medium:

if pH= 3, pOH= 11

In this case the molar concentration of hydronium is 0,001M. And the molar concentration of hydroxide ions is just 0,00000000001M.

6 0
3 years ago
Read 2 more answers
Sort the sentences based on whether they describe the properties of a heterogeneous or a homogenous mixture.
klasskru [66]
Homogeneous Mixture: 
<span>It may be mistaken for a pure substance. 
</span><span>It can be separated using distillation
</span>
Heterogeneous Mixture:
<span>Its components are visible
</span><span>It can be separated using distillation.
Concrete is an example of this kind of mixture.
</span>
Hope this helps!
5 0
3 years ago
Read 2 more answers
___ the volume of a gas <br><br> Which of the following will hold its shape?
monitta

the answer is plasma

6 0
3 years ago
Radioactive americium-241 is used in household smoke detectors and in bone mineral analysis.
Varvara68 [4.7K]

Answer:

Electrons- 95

Protons- 95

Neutrons-146

Explanation:

An atoms is made up of three fundamental particles; electrons, protons and neutrons,

Americium belongs to the f block in the periodic table. It is an actinide element.

An atom of Am-241 contains 95 protons, 95 electrons and 146 neutrons.

4 0
3 years ago
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