Question

How many marksmanship badges are authorized for wear at one time on the Army Blue Service Uniform?

a) Four
b) Three
c) Two
d) One

Answer 1

Nitrogen, with an atomic number of seven, has two electron shells. The first shell is completely filled with two electrons, and the second shell is partially filled with five electrons.

Step-by-step explanation:

The atomic number of an element indicates the number of protons in the nucleus, and for neutral atoms, this is also the number of electrons present. Nitrogen has an atomic number of seven, which means it has seven electrons. According to the standard arrangement of electrons in shells or energy levels, the first shell can hold up to two electrons and the second shell can hold up to eight. Therefore, nitrogen with seven electrons would completely fill the first shell and partially fill the second shell with the remaining five electrons. Thus, nitrogen has two electron shells.