The mass number of an anion, `X^(3-)`, is 14. if there are ten electrons in the anion, the number of neutrons in the nucleus of atom, `X_2` of the element will be

An element M having mass number 27 has 14 neutrons in its nucleus. The formula for oxide of this element will be

The mass number of two atoms X and Y having same atomic number are 208 and 210 respectively. The number of neutrons in the nucleus of X is 126. The number of neutrons in the nucleus of Y is :

An atom Y contains ten electrons and ten neutrons. State The number of protons it contains

There are 14 protons and 13 neutrons in the nucleus of an atom. What is its mass number ?

The mass number of element 'X' is 'A' . If X^(4-) contains 10 electrons and 6 neutrons , then the value of A/3 is

A radiaoactive nucleus (initial mass number A and atomic number Z emits 3 a- particles and 2 positrons The ratio of number of neutrons to that of proton in the final nucleus will be