Fill in the blanks with the correct word from the words in brackets :

1. A symbol represents a short form of a/an …………… [atom/element/molecule]
2. Compounds are always …………… [heterogeneous/homogeneous] in nature.
3. Variable valency is exhibited, since electrons are lost from an element from the …………… [valence/penultimate] shell.
4. A chemical equation is a shorthand form for a …………… [physical/chemical] change.
5. Relative molecular mass of an element/compound is the number of times one …………… of the substance is heavier than -1⁄12^th the mass of an atom of carbon [C¹²]. [atom/ion/molecule]

1. A symbol represents a short form of an element.
2. Compounds are always homogeneous in nature.
3. Variable valency is exhibited, since electrons are lost from an element from the penultimate shell.
4. A chemical equation is a shorthand form for a chemical change.
5. Relative molecular mass of an element/compound is the number of times one molecule of the substance is heavier than -1⁄12^th the mass of an atom of carbon [C¹²].