2020 Chemistry - Semester 1 Final Exam Review Modules 2-4

Front

What type of decay occurs when an atom's mass decreases from 138 to 134?

Back

Alpha decay occurs when an atom loses two protons and two neutrons, resulting in a decrease in mass.

Front

Which element is in period 1, group 8?

Back

Helium is the element located in period 1, group 8 of the periodic table.

Front

What charge does an atom have if it gains one electron?

Back

An atom that gains one electron will have a charge of -1.

Front

Which bond is stronger: S–H or S–F?

Back

The S–F bond is stronger than the S–H bond due to the higher electronegativity of fluorine.

Front

What charge does an atom have if it loses 2 electrons?

Back

An atom that loses 2 electrons will have a charge of +2.

Front

What is radioactive decay?

Back

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

Define an ion.

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the difference between alpha, beta, and gamma decay?

Back

Alpha decay involves the emission of alpha particles, beta decay involves the emission of beta particles (electrons or positrons), and gamma decay involves the emission of gamma rays (high-energy photons).

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions.