Chemistry Midterm Review

Front

Which two subatomic particles make up the nucleus of an atom?

Back

Protons and Neutrons.

Front

The melting of ice can be described as a __________.

Back

Physical change.

Front

How many valence electrons does Phosphorus have?

Back

5.

Front

This molecule has ______ bond and is a ______ molecule.

Back

Polar, polar.

Front

Hydrogen bonding occurs in molecules when ___________________.

Back

A hydrogen atom bonded to F, O or N is attracted to an electron pair on a F, O or N atom on an adjacent molecule.

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

Define a chemical change.

Back

A change that results in the formation of new chemical substances.

Front

What is the periodic table?

Back

A tabular arrangement of the chemical elements, organized by their atomic number.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a polar molecule?

Back

A molecule with a net dipole moment due to the presence of polar bonds.