Science - Easter Term- Work Energy Power And Reactivity

Question 1

Which if the following is a property of group 2 (
Alkali earth)elements:
- reactivity increases going down the group
- they are stored in oil because they are extremely unstable.
-they are diatomic( they exist as molecules)

Answer 1

Reactivity increases going down the group. Although this is also a property of the group 1 (alkali metals)

Question 2

Define the term molecule

Answer 2

A molecule is a particle made up of two or more atoms that are chemically bonded together.

Question 3

Define the term Compound.

Answer 3

A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.

Question 4

Define the term atom.

Answer 4

the smallest particle of a chemical element that can exist.