Exploring the Building Blocks of Matter

What is the charge of a proton?

• Negative

• Positive

• Neutral

• Variable

Which subatomic particle is not found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• Positron

What is the relative mass of an electron compared to a proton?

• The same

• Half

• Negligible

• Twice

What is the atomic number of an element?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons

• The total number of electrons in the outer shell

Which subatomic particle contributes to the atomic mass but not the charge of an atom?

• Proton

• Electron

• Neutron

• Positron

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

How does the number of neutrons in the nucleus of an atom affect the atom?

• It changes the atomic number.

• It changes the chemical properties.

• It has no effect.

• It changes the isotope of the element.

What happens to an atom if the number of electrons changes?

• It becomes an isotope.

• It becomes a different element.

• It becomes an ion.

• It remains unchanged.

Which subatomic particle was discovered by James Chadwick?

• Proton

• Electron

• Neutron

• Positron

What is the main function of electrons in chemical bonding?

• They contribute to the atomic mass.

• They determine the atomic number.

• They are involved in forming chemical bonds.

• They are found in the nucleus.