Define atomic mass and gram atomic mass.

Define :Atoms

Why are the atomic numbers and atomic mass numbers always in whole numbers ?

The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39 respectively. a. Calculate the average atomic mass of element B according to Dobereiner's triads. b. Compare the average atomic mass of B with its atomic mass. c. What could the elements A, B and C be?

Define molecular mass and gram molecular mass .

State the laws/ Define Isotopes have same atomic masses

Define atomic mass. Chlorine has two stable isotopes , Cl-35 and Cl-37 with atomic masses 34.968u and 36.956u respectively . If the average atomic mass is 35.453u , calculate the percentage abundance.

Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A). Z = 17, A = 35

Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A). Z = 92, A = 233

Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A). Z = 4, A = 9

Two elements X (Atomic mass 75) and Y (Atomic mass 12) combine to give a compound having 75.8% X. The empirical formula of the compound is