Periodic trends review

Front

What is atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

Which element has the largest atomic radius in Period 4?

Back

Potassium (K) has the largest atomic radius in Period 4.

Front

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

Back

The atomic radius increases because more shells (energy levels) are added.

Front

What happens to atomic radius as you move across a period from left to right?

Back

The atomic radius decreases due to an increase in the number of protons, which increases the attraction to electrons.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom.

Front

Which element has the lowest ionization energy in Group 1?

Back

Francium (Fr) has the lowest ionization energy in Group 1.

Front

Why does Francium have the lowest ionization energy?

Back

Its one valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

What is electron affinity?

Back

Electron affinity is the energy change that occurs when an electron is added to a neutral atom.

Front

Which element has a greater need for electrons (higher electron affinity), Fluorine or Lithium?

Back

Fluorine (F) has a greater need for electrons.

Front

What is the trend in ionization energy as you move across a period?

Back

Ionization energy generally increases as you move from left to right across a period.