PERIODIC TRENDS

Front

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

Back

increases, decreases

Front

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

Back

Its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

Why are elements towards the bottom of a group more reactive than those at the top?

Back

The electrons are farther from the nucleus.

Front

As you move down a group, atomic radius increases because -

Back

You add more and more shells (energy levels).

Front

What elements are the 'd-block'?

Back

Transition Metals

Front

What is the trend of atomic radius as you move from left to right across a period?

Back

Atomic radius decreases.

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom.

Front

What is the trend of ionization energy as you move down a group?

Back

Ionization energy decreases.

Front

What is the trend of electronegativity as you move from top to bottom within a group?

Back

Electronegativity decreases.

Front

What are alkali metals?

Back

Elements in Group 1 of the periodic table, highly reactive and have one valence electron.