Year 8 Chemistry and Physics Quiz

What is the smallest unit of matter that retains the properties of an element?

• Compound

• Molecule

• Atom

• Ion

Where are protons located in an atom?

• In the neutron cloud

• In the outer orbitals

• In the nucleus

• In the electron shells

What charge do electrons carry?

• Positive charge

• No charge

• Negative charge

• Neutral charge

Which model describes electrons in terms of probability clouds?

• The Dalton Model

• The Bohr Model

• The Quantum Mechanical Model

• The Rutherford Model

What is the maximum number of electrons that the 2nd energy level can hold?

• 32

• 8

• 18

• 2

What are isotopes?

• Atoms that have lost electrons

• Atoms with the same number of protons but different neutrons

• Atoms with different numbers of protons

• Atoms with the same number of electrons

What is the atomic number of an element?

• The number of protons

• The sum of protons and neutrons

• The number of neutrons

• The average mass of isotopes

What is the formula to convert Celsius to Kelvin?

• K = C + 32

• K = C + 273.15

• K = C - 273.15

• K = C × 9/5 + 32

What happens to substances when they are heated?

• They evaporate

• They freeze

• They expand

• They contract

Which thermometer is used to measure body temperature?

• Clinical Thermometer

• Infrared Thermometer

• Laboratory Thermometer

• Digital Thermometer