Question

if an atom has 5 protons and and 6 neutrons, what is the mass number for that atom?
none are correct
10.81
5
11
6
question 2 (1 point)
which of the following statements is true about nitrogen:
nitrogen has a mass number of 7
none are correct
nitrogen will always have 7 electrons
nitrogen has an atomic mass of 7
nitrogen will always have 7 protons

Explanation:

Step1: Recall mass - number formula

The mass number ($A$) of an atom is the sum of the number of protons ($p$) and neutrons ($n$), i.e., $A=p + n$.

Step2: Substitute given values

Given $p = 5$ and $n=6$, then $A=5 + 6=11$.

Step3: Recall nitrogen properties

Nitrogen has an atomic number ($Z$) of 7. The atomic number is equal to the number of protons. So nitrogen always has 7 protons. The mass - number can vary for different isotopes of nitrogen, and the number of electrons can change depending on the charge of the nitrogen species.

Answer:

Question 1: D. 11
Question 2: E. Nitrogen will always have 7 protons