Question

The symbol A is used to denote the ............. *

1) atomic number

2) atomic radius

3) atomic mass number

4 )atomic mass​

Answer 1

Answer:

atomic mass number is the correct answer

Answer 2

The symbol A in the symbolism is used to denote the atomic mass number. (Option 3)

• The number of protons in nucleus of an atom is the atomic number (Z) of that atom. It is the defining trait of an element, which means its value determines the identity of the atom.
• The atomic number also indicates the number of electrons along with the protons in an atom.
• The total number of protons and neutrons in an atom denote the atom's mass number (A).
• The number of neutrons is the difference between the mass number and the atomic number: A – Z = number of neutrons in an atom.

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