What do we call the atoms of different elements with
same mass number

What do we call the atoms of different elements with same number of neutrons.

Two different elements may have same mass number but not the same……….

Name the element with atomic number 119.

IUPAC has made some recommendations to name elements with atomic number above 100. what would be the name for the elements with atomic number 104 ?

a) What is the difference between atomic number and mass number. b) If the mass number of an element is 52 , and atomic number.is 24 , then how many neutrons will be there in the nucleus of its atom?

What do you expect the nature of hydrides formed by elements of atomic number 15, 19 ,23 and 44 with hydrogen?