Question

Beryllium has a nucleus composed of protons and neutrons. Given the data, how many protons are in a typical Beryllium nucleus?

A) 3
B) 4
C) 5
Eliminate
D) 9

Answer 1

Beryllium has an atomic number of four so has four protons in its nucleus. The atomic number shows how many protons are in the nucleus so once this number is known then the answer can be ascertained and recorded as such.

Answer 2

Atoms are made of 3 types of subatomic particles ; protons, neutrons and electrons

protons and neutrons are located inside the nucleus and electrons are found in energy shells around the nucleus. Protons are positively charged, electrons are negatively charged and neutrons are neutral. elements in their ground state are neutral with equal amounts of protons and electrons.

Atomic number is the number of protons. atomic number is characteristic for the element.

atomic number of Be is 4 therefore Be has 4 protons

answer is B. 4