Question

multiple choice 4 points
how many protons are in an atom of nitrogen - 15?
helium 2
he
4.0026
boron 5
b
10.811
carbon 6
c
12.011
nitrogen 7
n
14.007
oxygen 8
o
15.999
fluorine 9
f
18.998
neon 10
ne
20.180
aluminum 13
al
26.982
silicon 14
si
28.086
phosphorus 15
p
30.974
sulfur 16
s
32.065
chlorine 17
cl
35.453
argon 18
ar
39.948
7
8
15
14

Explanation:

Step1: Identify element in periodic table

Nitrogen has atomic number 7.

Step2: Recall proton - atomic number relation

Atomic number = number of protons.

Answer:

7