Periodic Table Trends: Key Concepts and Insights

What happens to the atomic radius as you move down a group in the periodic table?

• It decreases.

• It fluctuates.

• It remains the same.

• It increases.

Why does the atomic radius decrease as you move across a period?

• Because the electrons move to higher energy levels.

• Because the number of protons decreases.

• Because the number of energy levels decreases.

• Because the nuclear charge increases, pulling electrons closer.

What happens to the size of a sodium atom when it loses an electron to become a sodium ion?

• It becomes larger.

• It fluctuates in size.

• It remains the same size.

• It becomes smaller.

How do anions compare in size to their neutral atoms?

• Anions are smaller than their neutral atoms.

• Anions are the same size as their neutral atoms.

• Anions fluctuate in size compared to their neutral atoms.

• Anions are larger than their neutral atoms.

What is ionization energy?

• The energy needed to remove an electron from the valence shell of an atom.

• The energy needed to add an electron to an atom.

• The energy required to break a chemical bond.

• The energy released when an atom gains an electron.

How does ionization energy change as you move down a group?

• It fluctuates.

• It decreases.

• It remains the same.

• It increases.

What is electronegativity?

• The ability of an atom to attract electrons.

• The number of protons in an atom.

• The energy needed to remove an electron from an atom.

• The size of an atom in the ground state.

How does electronegativity change as you move down a group?

• It fluctuates.

• It increases.

• It remains the same.

• It decreases.

Why does electronegativity increase as you move across a period?

• Because the number of energy levels increases.

• Because the nuclear charge increases, attracting more electrons.

• Because the nuclear charge decreases.

• Because the atomic radius increases.

What is the overall trend for electronegativity on the periodic table?

• It remains the same across the periodic table.

• It decreases from left to right and from bottom to top.

• It fluctuates randomly across the periodic table.

• It increases from left to right and from bottom to top.