P2.5 radioactive substances decay

Question 1

outline the structure of the nucleus

Answer 1

the nucleus contains protons and neutrons .

Question 2

isotopes

Answer 2

they are atoms with different number of neutrons and same number of protons.
usually each element only has 1or2 stable isotopes.The other isotopes tend to be radioactive–the nucleus is unstable,so it decaysand emits radiation.

Question 3

what happes to a atom when it loses ad gains

Answer 3

If an atom loses one or more electrons, it becomes a positively charged ion
If an atom gains one or more electrons, it becomes a negatively charged ion