An atom baving mass number 40 has 20 neutrons in its nucleus. What is the atomic number of the clement?

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.

An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?

An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?

The atom of which element has no neutron in its nucleus ?

An atom has 16 neutrons in its nucleus. The Atomic no. of the element is 15 the mass num­ ber of the element is

An atom has 7 electrons in its M-shell and contains 18 neutrons in its nucleus .What is its mass number ?