Question

what is meant by atomic mass number explain how to atomic number and mass number of carbon are 6 and 12 respectively

Answer 1

⭐️ ATOMIC NUMBER - It can be defined as the number of electrons or protons present in the atom of an element. It is generally denoted by "Z".

⭐️ MASS NUMBER - The total number of protons and neutrons of an atom is called its mass number. It is generally denoted by "A".


⭐️ CARBON :-

◆◆◆◆◆ ATOMIC NO. - 6 ?? HOW ?? ◆◆◆◆◆
Carbon is the 6th element according to the modern periodic table and since the modern periodic table is arranged in the increasing order of atomic numbers, Carbon's 6th position represents that theatomic number of carbon is also 6.

◆◆◆◆◆ MASS NO. - 12 ?? HOW ?? ◆◆◆◆◆
Mass number = number of protons + number of neutrons.

In Carbon, there are 6 protons and 6 neutrons.
So, Mass number = 6+6 = 12.
Thus, we get the mass number of carbon 12.





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Answer 2

Answer:

It is the sum of the total number of neutrons and protons present in an atomic nucleus.

Atomic mass number = Number of neutrons + Number of protons

The atomic number is denoted by Z = Number of protons = Number of electrons.

The mass number is denoted by A = Number of protons + Number of neutrons.

For example: In a carbon atom the total number of protons = 6

Number of neutrons = 6

Number of electron = 6

Atomic number (Z) = number of protons = number of electrons = 6.

Mass number (A) = number of protons + number of neutrons = 6 + 6 = 12.