If atomic weight of C and S are 12 u and 32 u respectively , then an atomic of S is how manyTime heavier an an atom of C .

The three stable isotopes of neon: "_10^20 Ne , "_10^21Ne and "_10^22Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u,respectively. Obtain the average atomic mass of neon.

Carbon occurs in nature in the form of two isotopes with atomic mass 12 and 13 respectively. If average atomic mass of carbon is 12.011 u , what is the % abundance of the two isotopes ?

Calculate the mass 10^20 atoms of C.

Give the main points of Bohr’s Model of atom.

Give the main points of Bohr’s model of atom.

How many atoms are present in 1 gram atom of an element ?

A,B and C constitute the doberiner's traid. Atomic mass of a and c are 7 and 23 respectively' calculate atomic mas of B.

If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain ?