Question

How many spare cylinders should each company on the second alarm or greater bring with them in a high-rise fire response?

a) Two
b) Three
c) Four
d) None

Answer 1

Nitrogen has an atomic number of seven, indicating it has seven electrons, which are distributed across two electron shells—the first shell holding 2 electrons and the second shell holding the remaining 5 electrons.

Step-by-step explanation:

The atomic number of nitrogen is seven, which indicates the number of protons and also the number of electrons in a neutral atom. In the case of nitrogen, with its seven electrons, the distribution in electron shells follows the pattern defined by the quantum mechanical model of the atom. The first shell can hold up to 2 electrons, and the second shell can hold up to 8 electrons. Considering this, nitrogen, which has 7 electrons, would occupy two electron shells—the first shell with 2 electrons and the second shell with the remaining 5 electrons.

Therefore, the correct answer to how many electron shells nitrogen likely has is:

b. two