Important: Elements, Compunds, Molecules

Question 1

Definition of valencies

Answer 1

No. of bonds an atom can make

Question 2

Definition element

Answer 2

• Pure substance

- One type of atom

Question 3

Definition of compound

Answer 3

• Pure substance

- 2 or more elements chemically combined

Question 4

Definition of mixture

Answer 4

• Not pure substance

- 2 or more elements not chemically bonded

Question 5

Definition of molecule

Answer 5

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