Question

5 a lithium atom contains 3 protons, 4 neutrons and 3 electrons. what would be formed if one proton is added to this atom?
a lithium ion
a different isotope of lithium
a beryllium ion
a neutral atom of beryllium

Explanation:

The atomic number is determined by the number of protons. Lithium has an atomic number of 3 (3 protons). Adding one proton makes the atomic number 4, which is beryllium. Since the number of electrons (3) is one less than the new number of protons (4), a beryllium ion is formed.

Answer:

C. a beryllium ion