Chemistry Semester Review Final

Front

What does the principal quantum number (n) represent in an atom?

Back

The principal quantum number (n) represents the energy level of an electron in an atom.

Front

What happens to electrons when cations are formed?

Back

Cations lose electrons and become positively charged.

Front

What did J.J. Thomson discover about the structure of the atom?

Back

J.J. Thomson provided evidence that an atom contains negatively charged particles.

Front

What is the electron configuration for Gallium?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p¹.

Front

What is the chemical formula for Scandium Fluoride?

Back

The chemical formula for Scandium Fluoride is ScF₃.

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 cations and anions?

Back

Cations are positively charged ions formed by losing electrons, while anions are negatively charged ions formed by gaining electrons.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom 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.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.