According to Dalton's theory, 'during chemical combination, atoms of different elements combine in a simple whole number ratio '- justify or criticise.

Atomic mass of an element is not necessarily a whole number because :

Which law of the chemical combination is known as law of equivalent ratio?

Show that in the number of combinations of 2n different things taken n at a time , the number of combinations in which a particular thing occurs , is equal to the number in which it does not occur .

"Two different elements may combine together in a definite proportion by mass to form two different isomeric compounds. Again two different elements may combine together in different proportions by mass to produce two different compounds". Comment on this.

According to lother meyer, the physical properties of the elements are periodic functions of their atomic number.

The number of combinations of n different of n different things taken r at a time in which p particular things never occur is -

The number of combinations of n different things taken r at a time in which p particular things always occur is -

Which law of Chemical Combination does not obey Dalton's atomic theory?

Which combination of atomic orbitals is not allowed according to MO theory-

Which combination of atomic orbitals is not allowed according to MO theory-