Science Quiz 3B

The __________ is about 1836 times the mass of an electron. The slightly more

massive __________ is about 1838 times the mass of an electron.

• proton, neutron
• muon, tau
• quark, gluon
• electron, positron

Carbon-14 is different from carbon-12 in that it has a different number of

• neutrons
• molecules
• electrons
• protons

Which of the following is a weighted average?

• atomic mass

• atomic number

• mass number

• none of the above

How many neutrons does rubidium-85 have?

• 48
• 52
• 50
• 47

Describe two ways that an atom can become an ion. What are each of these ions called and what

type of charge does each have?

• Cation (positive charge) and Anion (negative charge)
• Cation (negative charge) and Anion (positive charge)
• Electron (negative charge) and Proton (positive charge)
• Proton (positive charge) and Neutron (neutral charge)

Silicon has three stable isotopes: silicon-28, silicon-29, and silicon-30. Silicon’s atomic mass is

28.085u. Which isotope of silicon is more common?

• Silicon-28
• Silicon-27
• Silicon-31
• Silicon-32

Which type of subatomic particle is not found inside the nucleus?

• Protons
• Neutrons
• Quarks
• Electrons

State the type of electric charge associated with each of the three main subatomic particles.

• Neutral charge

• Proton

• Negative charge

• electron

• Positive charge

• neutron

One isotope of sulfur has sixteen protons and eighteen neutrons. What is the name of this isotope?

• sulfur-36
• sulfur-34
• sulfur-30
• sulfur-32

How does an ion differ from an atom?

• An ion is a type of atom that cannot bond with other atoms.
• An ion is always larger than an atom.
• An ion differs from an atom in that it has a net electric charge due to the loss or gain of electrons.
• An ion has the same number of protons as electrons.