Periodic trends review

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom in its gaseous state.

Front

Which element has the smallest ionization energy in Period 6?

Back

Cesium (Cs)

Front

Why does Francium (Fr) have the lowest ionization energy in Group 1?

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

The amount of energy released when an electron is added to a neutral atom to form a negative ion.

Front

As you move down a group in the periodic table, what happens to electron affinity?

Back

It decreases.

Front

Which element has a greater need for electrons: Chlorine (Cl) or Francium (Fr)?

Back

Chlorine (Cl) has a greater need for electrons.

Front

What is atomic radius?

Back

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

Front

Which atom has the largest atomic radius in Period 4?

Back

Potassium (K)

Front

What trend is observed in ionization energy as you move across a period from left to right?

Back

Ionization energy generally increases.

Front

What is the trend in atomic radius as you move down a group?

Back

Atomic radius increases.