Chemistry Midterm Review

Front

What is the Lewis Dot Structure?

Back

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What is the scientific method?

Back

A series of steps used by scientists to solve a problem or answer a question, including observation, hypothesis, experimentation, and conclusion.

Front

True or False: Protons and Neutrons have about the same mass.

Back

True - They have about the same mass.

Front

How many significant figures are in the number 27000000?

Back

2 significant figures.

Front

What does the atomic number of an element represent?

Back

The number of protons in the nucleus of an atom.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

No charge (neutral).

Front

What is the charge of an electron?

Back

Negative charge.

Front

Define an atom.

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a molecule?

Back

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.