Chemistry: Atoms & Elements Unit Exam

Which is a mixture that appears to be all the same throughout?

• Compound

• Homogeneous

• Heterogeneous

• Mechanical Mixture

The number of protons in a nucleus is knows as:

• Neutrons

• Electrons

• Atomic Number

• Atomic Mass

Which of the following is A change in which no new type of matter is produced?

• Physical Change

• Chemical Change

• Change in Atoms

• Atomic Structure Change

A subatomic particle that is found in the nucleus of an atom and has no charge is called an:

• Nucleus

• Protons

• Neutrons

• Electrons

The smallest particle of matter is known as:

• A Compound

• A Molecule

• An Element

• An Atom

The central part of the atom that consists of protons and neutrons is called a(n):

• Nucleus

• Protons

• Neutrons

• Electrons

A subatomic particle that has a negative charge is called a(n):

• Proton

• Neutron

• Electron

• Nucleus

A pure substance that can not be broken down into a simpler substance is a(n):

• Compound

• Element

• Solution

• Water

A mixture in which the different parts are easily able to be seen is known as:

• Compound

• Homogenous

• Heterogeneous

• Properties

A pure substance made of two or more different elements combined in a definite proportion is called a(n):

• Compound

• Element

• Solution

• Mechanical Mixture