Stemscopes Exam Chemistry Fundamentals

Question 1

What is the atomic number of an element?

Accepted Answer

Number of protons

Answer

Number of neutrons

Answer

Number of electrons + protons

Answer

Mass of the atom

Question 2

Which subatomic particle has no charge?

Accepted Answer

Neutron

Answer

Proton

Answer

Electron

Answer

Ion

Question 3

What type of bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 4

What is the chemical formula for water?

Accepted Answer

H2O

Answer

HO

Answer

H2O2

Answer

OH

Question 5

In a chemical reaction, what are the starting materials called?

Accepted Answer

Reactants

Answer

Products

Answer

Catalysts

Answer

Compounds

Question 6

What does the law of conservation of mass state in a chemical reaction?

Accepted Answer

The total mass of reactants equals the total mass of products

Answer

Mass is created during reactions

Answer

Mass is destroyed during reactions

Answer

Mass can be lost as energy