Group 1 Elements

Front

What are Group 1 elements?

Back

Group 1 elements, also known as alkali metals, include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). They are characterized by having one valence electron.

Front

What is the general trend in reactivity of Group 1 elements?

Back

Reactivity increases down the group. For example, cesium is more reactive than lithium.

Front

What happens when Group 1 elements react with water?

Back

Group 1 elements react with water to produce hydrogen gas and an alkaline solution (metal hydroxide).

Front

What gas is produced when Group 1 elements react with water?

Back

Hydrogen gas is produced.

Front

What type of ion do Group 1 elements form?

Back

Group 1 elements form 1+ ions.

Front

What is the melting point trend in Group 1 elements?

Back

The melting point decreases as you move down the group.

Front

How many valence electrons do Group 1 elements have?

Back

Group 1 elements have one valence electron.

Front

What is the electron configuration of sodium (Na)?

Back

The electron configuration of sodium is 1s² 2s² 2p⁶ 3s¹.

Front

What is the significance of the valence electron in Group 1 elements?

Back

The single valence electron is responsible for the high reactivity of Group 1 elements.

Front

What is the physical state of Group 1 elements at room temperature?

Back

Most Group 1 elements are soft, silvery metals that can be cut with a knife.