element, molecule

What is the difference between the molecules of elements and compounds?

(a) What is an atom ? How do atoms usually exist ? (b) What is a molecule? Explain with an example. (c ) What is the difference between the molecule of an element and the molecule of a compound ? Give one example of each.

For two elements forming a bond, |X_A –X_B| = 2.0 . What is percent ionic character for this covalent molecule?

The number of atoms present in a molecule of an element is known as its

The diamagnetic molecules from among mole cules of second period elements are

Fill in the blanks with appropriate words given below : Molecular mass is the _______ of atomic masses of elements present in a molecule. The mass of one mole of a substance in grams is called its _________ mass. The atomic masses represented in periodic table are their _______ masses.