Warm Up 3.1 - Isotopes & Ions

What is an ion?

• An atom or molecule with a net electric charge due to the loss or gain of electrons

• An atom with a different number of protons

• A molecule with only covalent bonds

• An atom with a neutral charge

Which of the following best describes a cation?

• An atom that has gained electrons and has a negative charge

• An atom that has lost electrons and has a positive charge

• An atom that has gained protons

• An atom that has lost neutrons

What is an anion?

• An atom with a positive charge

• An atom with a neutral charge

• An atom with a negative charge

• An atom with no electrons

Which statement is true about isotopes?

• Isotopes have the same number of protons but different numbers of neutrons

• Isotopes have different numbers of protons and electrons

• Isotopes have the same number of neutrons but different numbers of protons

• Isotopes have different numbers of electrons only

• By gaining one electron

• By losing one electron

• By gaining one proton

• By losing one neutron

Which process results in the formation of an anion?

• An atom loses electrons

• An atom gains electrons

• An atom loses protons

• An atom gains neutrons

Two common isotopes are Carbon-12 and Carbon-14.

Carbon-12 has ​ (a)   neutrons and ​ (b)   protons.

Carbon-14 has​ (c)   neutrons and ​ (d)   protons.

• 6
• 8
• 7
• 5

Why do the isotopes Uranium-235 and Uranium-238 have different masses?

• They have a different number of protons

• They have a different number of neutrons

• They have a different number of electrons

• They have a different number of nucleons