Question

what is meant by atomic number and mass number of carbon are 6 amd 12 respectively??
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Answer 1

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ATOMIC NO. = No. of protons

MASS NO. = No. of protons + Electons

ELECTRON NO. = No. of protons

NEUTRON NO. = Mass no. - No. of protons

In Carbon:

Atomic no. = 6

Proton no. = 6

Electron no. = 6

Neutron no. = 6

Mass no. = 12