The atomic number and mass number of an element are 13 and 27 respectively. Find the number of neutrons.

The atomic number and mass number of an element are 16 and 32 respectively.Find the number of proton electrons and neutrons in it. State its valency .Is this element a metal or a non-metal .Justify your answer.

Atomic number and mass number of an element M are 25 and 52 respectively. The number of electrons, protons and neutrons in M^(+2) ion are respectively.

The atomic number and the mass number of an element M are 12 and 24 respectively . Calculate the number of neutrons in an atom of the element.

For an element , if atomic number (Z) and mass number (A) are 29 and 63 respectively . Then the number of protons , neutrons and electrons respectively are :-

If Z and A are atomic number and mass number of an element. Find the number of neutrons present in it.

Are mass number and atomic number of an element same in all respects ?

The nucleus of the atom of an element contains 17 protons and 18 neutrons. Calculate the atomic number and mass number of the element and represent them along with the symbol of the element.

The nucleus of the atom of an element contains 17 protons and 18 neutrons. Calculate the atomic number and mass number of the element and represent them along with the symbol of the element.

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?