Topic 2.1

What are the two types of particles found in the nucleus of an atom?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Electrons and orbitals

What is the relative charge of a neutron?

• +1

• -1

• 0

• 1/2000

In atomic notation, what does the letter 'Z' represent?

• Mass number

• Atomic number

• Charge

• Element symbol

What is the defining characteristic of isotopes?

• They have a different number of protons.

• They have a different number of electrons.

• They have the same atomic number but a different mass number.

• They have the same mass number but a different atomic number.

Are you enjoying the video lesson?

• Yes

• No

What happens to an atom when it gains electrons?

• It becomes positively charged.

• It becomes negatively charged.

• It remains neutral.

• It becomes an isotope.

A Magnesium ion (Mg2+) has an atomic number of 12 and a mass number of 24. How many electrons does it possess?

• 12

• 10

• 14

• 24

What is the defining characteristic that differentiates an isotope from a standard atom of the same element?

• A different number of protons.

• A different number of electrons.

• A different number of neutrons.

• A different atomic number.

What is the primary function of a mass spectrometer?

• To measure the temperature of an element.

• To determine an element's relative atomic mass from its isotope composition.

• To separate compounds based on their boiling points.

• To identify the number of protons in an atom.