Periodic Trends - Unit 5

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

What trend is observed in ionization energy across a period?

Back

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

Front

What trend is observed in ionization energy down a group?

Back

Ionization energy generally decreases as you move down a group.

Front

What is electronegativity?

Back

Electronegativity is a measure of how well an atom can attract electrons in a chemical bond.

Front

Which element has greater ionization energy: Magnesium or Phosphorus?

Back

Phosphorus has greater ionization energy than Magnesium.

Front

What is the atomic radius?

Back

The atomic radius is 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) has the largest atomic radius in Period 4.

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 the trend in atomic radius as you move across a period?

Back

The atomic radius generally decreases from left to right across a period.