Practice Quiz for Unit Test

Which of the following is a substance composed of only one type of atom?

• Proton

• Neutron

• Compound

• Element

A substance formed when two or more elements chemically combine in fixed proportions is called a:

• Compound

• Isotope

• Element

• Solids

A state of matter in which particles are closely packed together and have a definite shape and volume is called a:

• Gas

• Liquid

• Solid

• Compound

A state of matter in which particles have high energy, are widely spaced, and have neither a definite shape nor a definite volume is known as a:

• Solid

• Liquid

• Gas

• Compound

Which process is used in the industry for separating and purifying components of a liquid mixture based on differences in their boiling points & volatility?

• Chromatography

• Distillation

• Filtration

• Ions

Which technique is employed in the industry to separate and analyze components of a mixture based on their differing affinities for a stationary phase and a mobile phase, used mainly in forensics?

• Distillation

• Filtration

• Chromatography

• Ions

Which subatomic particle has a positive charge and is found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• Ion

Which subatomic particle has a negative charge and orbits the nucleus of an atom?

• Proton

• Neutron

• Electron

• Ion

Atoms or molecules that have gained or lost electrons, resulting in a net electrical charge, are called:

• Isotopes

• Ions

• Compounds

• Elements

Atoms of the same element with a different number of neutrons are called:

• Ions

• Isotopes

• Compounds

• Elements