Chapter 16 PRETEST

What are valence electrons?

The building elements of all other substances are

Elements that are predicted but not proven are

The number of protons in an atom gives its

Average atomic mass is calculated by adding

Mendeleev's periodic table was arranged by

The smaller particles that make up protons and neutrons are

Electrons have a charge of

When a scientific theory gets enough evidence it turns into a law.

The physicist who rearranged the table according to atomic number was

The number of protons + neutrons is known as the

The physicist who said that atoms are the smallest particle and can combine but cannot be cut

In order for a scientific law/theory to change there must be

The tiny unit created to measure subatomic masses is the

Today's periodic table is organized according to

Elemental symbols always start with

Protons have a charge of

Neutrons have a charge of

How long does it take to change a theory?

If most chlorine atoms have a mass of 35 and some have 37, what is the average atomic mass?

Understanding the elements better can help us to understand how the universe was created.

The vertical columns on the periodic table are called

The current model changed Bohr's by adding

The physicist who discovered that electrons move in energy levels was

Boxes on the periodic table include all of the following EXCEPT

Before electrons can fill another energy level, they must first

Electron dot diagrams include

The smallest part of an element that retains the element's properties is the

There are _________ kinds of quarks.

The physicist who added the discovery of the negative electron was

Electrons aren't included in the mass number since their mass is

The center of an atom is the

Isotopes are atoms of the same element that have different

The physicist who added the discovery of the nucleus was

Protons are located