S3

Question 1

What is the basic building block for all matter?

Answer 1

The basic building block for all matter is an atom.

Question 2

What is an element?

Answer 2

An element is a substance consisting of a single type of atom.

Question 3

What are molecules?

Answer 3

Molecules are a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Question 4

What are compounds?

Answer 4

Compounds are formed when different elements bond together.

Question 5

What are the characteristics of some compounds?

Answer 5

Some compounds have small structures with just a few atoms bonded together (e.g., H2O), while others have large, complex structures.

Question 6

Identify the substance: Sodium Chloride

Answer 6

Sodium Chloride (NaCl) is a compound.

Question 7

Identify the substance: Nickel

Answer 7

Nickel (Ni) is an element.

Question 8

Identify the substance: Water

Answer 8

Water (H2O) is a compound.

Question 9

Identify the substance: Copper Sulfate

Answer 9

Copper Sulfate (CuSO4) is a compound.

Question 10

Identify the substance: Oxygen

Answer 10

Oxygen (O2) is an element.

Question 11

Identify the substance: Rust

Answer 11

Rust (Fe2O3) is a compound.

Question 12

Identify the substance: Mercury

Answer 12

Mercury (Hg) is an element.

Question 13

Identify the substance: Sand

Answer 13

Sand (SiO2) is a compound.