UBSI 2024 Review

What is the charge and location of protons in the atom?

• +1; inside the nucleus
• -1; inside the nucleus
• +1; outside the nucleus
• -1; outside the nucleus
• 0; inside the nucleus

What is the charge and location of neutrons in the atom?

• 0; inside the nucleus
• +1; inside the nucleus
• -1; inside the nucleus
• +1; outside the nucleus
• -1; outside the nucleus

What is the charge and location of electrons in the atom?

• -1; outside the nucleus
• +1; inside the nucleus
• -1; inside the nucleus
• +1; outside the nucleus
• 0; inside the nucleus

A radioactive atom has 92 protons. A decay event happened and now the atom has only 90 protons. The decay event was _____________

• An alpha particle
• A beta particle
• A gamma wave

Americium-241 (Am) is a radioactive isotope used in some smoke detectors. It is primarily an alpha emitter. How many protons does it have left over after it shoots out an alpha particle?

• 91
• 95
• 89
• 93

A radioactive atom has 92 protons. A decay event happened and now the atom has 93 protons. The decay event was _____________

• An alpha particle
• A beta particle
• A gamma wave

Actinium-227 (Ac) is a beta emitter, meaning it primarily undergoes beta radiation, and can be used as a probe to measure moisture in soil or highway construction. After a beta decay event, what happens to the actinium atom?

• The actinium atom transforms into Thorium-227 (Th).
• The actinium atom transforms into Radium-223 (Ra)
• The actinium atom transforms into Protactinium-238 (Pa)

• The actinium atom transforms into Francium-225 (Fr)

A radioactive atom has 92 protons. A radioactive event happened and now the atom has 92 protons. The decay event was _____________

• An alpha particle
• A beta particle
• A gamma wave

How many valence electrons are in oxygen?

• 6
• 1
• 2
• 3
• 4

How many single bonds does oxygen want to satisfy the octet rule?

• 1
• 2
• 3
• 4