In a atomic nucleus structure of a lithium atom?

Question

In a atomic nucleus structure of a lithium atom:

1. how many are the neutrons (neutral charge)?

2. how many are the protons (positive charge)?

P.S. Please share a weblink for your source of reference.

thanks

Answer 1

Lithium has four neutrons and three protons. The number of protons is determined by the Atomic Number, which is the number at the upper left of the periodic table. Using the nearest whole number of the atomic weight, which is the numerical average of the relative proportions of the isotopes, and subtracting the atomic number, the number of neutrons is determined. For lithium with an atomic weight of 6.941, or about 7, the number of neutrons is 7 - 3 = 4. P. S. I referred to my Periodic Table of the Elements, not the web for my answer. I do not normally search the web for my answers.

Answer 2

3 protons
4 neutrons

Type in "lithium" in google or wikipedia