GRADE 8 SCIENCE 3RD QUARTER

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

Which subatomic particle carries a positive charge?

• Proton

• Neutron

• Electron

• Nucleus

What is the basic building block of matter?

• Atom

• Molecule

• Element

• Compound

Which subatomic particle has a negligible mass?

• Proton

• Neutron

• Electron

• Nucleus

In which part of the atom are protons and neutrons located?

• Electron cloud

• Nucleus

• Energy levels

• Valence shell

Which group of elements is highly reactive and tends to form salts?

• Alkaline earth metals

• Halogens

• Noble gases

• Transition metals

How are elements with similar chemical properties arranged in the periodic table?

• In a diagonal line

• In the same column

• In the same row

• In a random pattern

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

What is the total number of protons in an atom called?

• Atomic mass

• Atomic number

• Mass number

• Electron number

What is the term for a substance made up of only one type of atom?

• Molecule

• Compound

• Element

• Ion