How does the atomic size vary as we go down a group? Atomic size mainly depends on two factors. • Effective nuclear charge • Number of shells/orbits In a group of periodic table effective nuclea…

Catalyst is a chemical substance that speeds up the chemical reaction without altering the final product and without undergoing any chemical change in itself. However it may change its physica…

Here structure of an atom is shown in figure.  Number of protons and electrons are equal in a neutral atom. And their number is equal to atomic number .   For example hydrogen has atomic numbe…