Which of the following is the number of protons in a lithium atom?
A.
7
B.
3
C.
12
D.
4
To determine the number of protons in a lithium atom, we refer to the atomic number of the element. The atomic number indicates the number of protons in an atom’s nucleus.
For lithium (Li):
The atomic number is 3.
This means a lithium atom has 3 protons.
The correct answer is B. 3.