Chemistry A Final Exam Review

Front

What does the atomic number represent in an atom?

Back

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

Front

What is the charge of a neutron?

Back

A neutron has no charge.

Front

How can you determine if a molecule is polar or non-polar?

Back

A molecule is polar if it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape; otherwise, it is non-polar.

Front

What is the name of the compound Al(NO₃)₃?

Back

The name of the compound Al(NO₃)₃ is Aluminum Nitrate.

Front

What is the atomic mass of an isotope with 2 protons and 2 neutrons?

Back

The atomic mass of this isotope is 4.

Front

Define a polar molecule.

Back

A polar molecule is a molecule that has a partial positive charge on one end and a partial negative charge on the other end due to unequal sharing of electrons.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.

Front

What is the significance of the periodic table?

Back

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

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.