Understanding Atomic Radius Trends in the Periodic Table

What happens to the atomic radius as we move from left to right across a period in the periodic table?

• It increases

• It decreases

• It remains the same

• It fluctuates

Why does the atomic radius increase as we move down a group in the periodic table?

• Because the number of protons decreases

• Because the number of electron shells increases

• Because the number of neutrons increases

• Because the atomic mass decreases

Which property is related to the atomic radius and affects the energy required to remove an electron from an atom?

• Electronegativity

• Ionization energy

• Atomic mass

• Electron affinity

What is the atomic radius?

• The distance from the nucleus to the outermost electron

• The number of protons in the nucleus

• The number of electron shells

• The mass of the atom

Tags

NGSS.HS-PS1-1

Why do transition metals have unpredictable changes in atomic radius?

• Due to the filling of inner electron shells

• Due to the increase in atomic mass

• Due to the decrease in the number of protons

• Due to the increase in the number of neutrons