Atomic Number|Mass Number#!#Valency

Atomic Number|Mass Number|Numericals

The details about three atoms X,Y and Z are given. Given information about their atomic number mass number and valency?

What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z ? Give your answer in a tabular form.

Derive a relatioship between the atomic number, mass number and number of neutrons in an atom.

Define atomic number and mass number .

The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element ?

What is the valency of the element with atomic number 36 and mass number 84 ?

What is the number of valence electrons in the atom of an element A having atomic number 17 ? Name the valence shell of this atom.

What is the number of valence electrons in the atom of an element A having atomic number 20? Name the valence shell of this atom.

(a) What are valence electrons ? Where are valence electrons situated in an atom ? (b) What is the number of valence electrons in the atoms of an element having atomicm number 13 ? Name the valence shell of this atom.