If $W$ is the mass number and $N$ is the atomic number of an element,then:

What is the atomic number of carbon? Give the symbols of its isotopes.

An element $_ZM^{19}$ has $10$ neutrons in its nucleus. To which block does it belong?

Which of the following is correct?

Which of the following properties are different for neutral atoms of isotopes of the same element?

The atomic number of bromine is $35$ and its atomic weight is $79$. Two isotopes of bromine are present in equal amounts. Which of the following statements represents the correct number of neutrons?