Atomic Structure Quiz Review

Which subatomic particles contain most of the mass of an atom?

• Protons and electrons
• Protons and neutrons
• Neutrons and electrons
• Neutrons only

If Uranium's atomic number is 92 and it has 10 neutrons, how many protons does it have?

• 10
• 82
• 92
• 102

Which of the following best describes a proton?

• Negatively charged
• Same mass as a neutron
• Mass is negligible
• Orbits around the nucleus

Which statement is true about a proton and an electron?

• They have the same masses and different charges
• They have the same masses and same charges
• They have different masses and same charges
• They have different masses and different charges

How many protons and neutrons are in the following isotope?
²⁰⁴₈₁Tl

• 204 protons, 81 neutrons
• 81 protons, 204 neutrons
• 81 protons, 123 neutrons
• 123 protons, 285 neutrons

What is the most abundant isotope of nitrogen?

• Nitrogen-7
• Nitrogen-14
• Nitrogen-15
• Nitrogen-16

What makes atoms neutral?

• Positive protons and negative electrons make a neutral charge
• Positive protons and negative neutrons make a neutral charge
• Positive electrons and negative protons make a neutral charge
• Positive electrons and negative neutrons make a make a neutral charge

Ions are atoms that do not have a neutral charge. When might this occur?

• If an atom loses an electron
• If an atom gains an electron
• If an atom does not have the same number of protons and electrons
• All of the above