Bio 2 Ch 2 Test

Anything that takes up space and has mass...

• Matter

• Atoms

• Air

• Chemistry

A substance that cannot be broken down to other substances by chemical reactions...

• Matter

• Element

• Compound

• Cell

Sodium chloride is a substance that consists of two elements in a fixed ratio. Sodium chloride is known as a...

• Compound

• Element

• Domain

• Reaction

How many elements are essential to life?

• 25

• 30

• 95

• 110

Trace elements...

• are required by an organism in small quantities

• are not essential whatsoever

• are carbon, hydrogen, oxygen, and nitrogen

• are most often not included in the periodic table

Which of the following is not an element that makes up 96% of living matter?

• Carbon

• Hydrogen

• Oxygen

• Sodium

The smallest unit of matter that still retains the properties of an element...

• Atom

• Cell

• Molecule

• Compound

Neutrons, Protons, Electrons. These are all examples of...

• Atoms

• Subatomic particles

• Matter

• Elements

_____ form the Atomic Nucleus, while _____ form a cloud around the nucleus....

• Neutrons and Protons; Electrons

• Electrons and Protons; Neutrons

• Neutrons and Electrons; Protons

• Protons; Neutrons and Electrons

The atomic number is calculating by counting the...

• Number of protons

• Number of electrons

• Neutrons

• Isotopes present