# Question #3ca57

Apr 21, 2017

Because Na atom has extra electron

#### Explanation:

When we are talking of a $N {a}^{+}$ ion we are talking of a $N a$ atom with 1 less electron

while an Na atom has

an extra electron which is the only one present in its last accessible orbital thus covering more space.If you think it as a circle.consider nucleus as the center of the circle

Whereas in Na atom