The atomic mass and atomic number of lead are 208 and 82. The atomic mass and atomic number of bismuth are 209 and 83. The `"neutron"//"proton"` ratio in an atom

The atomic mass of lead is 208 and its atomic number is 82. The atomic mass of bismuth is 209 and its atomic number is 83. The ratio of neutrons/protons in the atom

Atomic number of a nucleus is Z and atomic mass is M . The number of neutron is.

The number of protons in an atom of atomic number Z and mass number A is

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.

How many electrons and neutrons are there in an atom of mass number A and atomic number Z?