Question

How many electrons does Na' has in its outermost shell:
(a) 10
(b) 11
(c) 18
(d) 8​

Answer 1

Answer:

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.

Answer 2

Na has one electron in its outermost shell.

• Na is an alkali metal.
• It has an atomic number of 11.
• The electronic configuration of Na is as follows-
• ${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{1}$
• Thus Na has 2 electrons in 1s orbital, a total of 8 electrons in 2p and 2s orbitals and one electron in 3s orbital.
• Here the 3s orbital is the outermost shell.
• So, the outermost shell of Na is a 3s shell that has a total of 1 electron.