How many valence eclectrons does sodium have

1

Explanation:

Sodium is a group 1 element and as such it has 1 valence electron.

The valence electron of sodium can easily be obtained from it's electronic configuration as shown below:

Na (11) : 1s2 2s2 2p6 3s1

From the above illustration, we see that the last shell (3s) has only 1 electron. This electron is regarded as the valence electron of sodium.

Answer: one valence electron

Explanation:

Sodium has one valence electron. The element has a full innermost electron shell of two electrons and a full shell of eight electrons in the next shell. The third shell, which is the outermost and the valence shell, has only one electron. Valence electrons influence chemical reactivity.