Chemistry Unit

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

How do covalent bonds form?

Back

Covalent bonds form by the sharing of valence electrons between atoms.

Front

What type of bond is formed in carbon dioxide (CO2)?

Back

Covalent bond.

Front

What kind of bonds do metals and nonmetals typically form?

Back

Ionic bonds.

Front

What is the chemical symbol for Uranium?

Back

U.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond that occurs when electrons are transferred from one atom to another, resulting in the formation of charged ions.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons and the attraction between oppositely charged ions, while covalent bonds involve the sharing of electrons.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number of an element and contribute to the mass of the atom.