Question

What do the symbols Z, N, A mean respectively?

A. Atomic number, Neutron, Atomic mass
B. Atomic mass, Proton, Neutron
C. Atomic number, Proton, Atomic mass
D. Neutron, Atomic number, Atomic mass

Answer 1

The symbols Z, N, and A represent the atomic number, number of neutrons, and mass number of an atom, respectively.

Step-by-step explanation:

The symbols Z, N, and A in chemistry represent specific properties of atoms. Z represents the atomic number, which is the number of protons in the nucleus of an atom. N represents the number of neutrons in the nucleus. A represents the mass number, which is the total number of protons and neutrons in the nucleus.

For example, if we take the element carbon (C), it has an atomic number of 6, which means it has 6 protons in its nucleus. If the carbon atom has 6 neutrons, its mass number would be 12 (6 protons + 6 neutrons = 12).

So, the correct answer is option C: Atomic number, Proton, Atomic mass.