Name one Importance of solar power

Increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in the gas molecules which break intermolecular bonds and escape from solution.

Pb (lead) is in the 6th period

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Option C, decreases as you move from left to right across a period

As you move from left to right across a period, the atoms get more and more protons. These protons pull on the electrons, making the atoms progressively smaller and smaller because of the increasing pull.

Final answer:

Atomic size generally increases as you move from top to bottom within a group due to increase in the principal quantum number. However, atomic size generally decreases as you move from left to right across a period, as the added protons and electrons increase the effective nuclear charge and pull the electrons in closer.

Explanation:

In the context of atomic size on the periodic table, there are two primary trends to notice: Atomic size generally decreases as you move from left to right across a period. This happens because as we move from left to right, we add a proton to the nucleus and an electron to the valence shell with each successive element, thereby increasing the effective nuclear charge and pulling the electrons in tighter to the nucleus.

Atomic size generally increases as you move from top to bottom within a group. This is due to the increase in the principal quantum number, causing the atomic radius to grow as there are more electron shells.

These observations come from understanding the electronic structure of elements and how they influence the properties like atomic size, ionization energies and electron affinities that vary periodically as the electronic structure of the elements changes.

Learn more about Atomic Size here:

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A substance in the solid phase (state) of matter has a definite shape and a definite volume.

What is volume?

Volume is the amount of space taken up by an object, while capacity is the measure of an object's ability to hold a substance, like a solid, a liquid or a gas. Volume is measured in cubic units, while capacity can be measured in almost every other unit, including litres, gallons, pounds, etc.

Matter in the solid-state maintains a fixed volume and shape, with component particles (atoms, molecules or ions) close together and fixed into place.

Hence, option A is correct.

Learn more about phases here:

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Answer:

your answer would be 0.3 meters

To get the meter you have to divide the length 30 value by 100

which will give you 0.3.

Hope this helped! Have an amazing rest of your day :)