SCIENCE
PHYSICAL SCIENCES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
How many valence electrons does sodium have?
|
|
1
|
|
|
2
|
|
|
3
|
|
|
4
|
Explanation:
Detailed explanation-1: -As sodium has an atomic number of 11, the first and second shell will be filled and the third shell will have 1 electron. Valence electrons (VE) are the electrons in the outer shell of an atom. Hence sodium has 1 valence electron.
Detailed explanation-2: -Neutral sodium atom on left has 11 protons and 11 electrons. Sodium ion on right has 11 protons and 10 electrons, with a +1 overall charge.
Detailed explanation-3: -Electronic configuration of sodium is 2, 8, 1. It has one valence electron. Thus, its valency is one.
Detailed explanation-4: -A: Any element in group 1 has just one valence electron. Examples include hydrogen (H), lithium (Li), and sodium (Na).
There is 1 question to complete.