Question

Fill in the blank spaces by choosing the correct words from the list given below:
nuclear , homogeneous , atoms , harmful , physical

1. A pure substance is___________in nature.

2. The composition of a pure substance cannot be altered by any __________means.

3. Normal elements are those which do not give __________radiations.

4. An elements is a pure substance, made up of only one kind of _________.​

5.Radioactive elements can be prepared artificially by the____________ reactions.

Answer 1

Answer:

1.Homogenous

2.physical

3.harmful

4.atoms