Biology Exam 2

We learned that cells are the basic units of life. Atoms are the basics units of

• the periodic table

• matter

• energy levels

• elements

Overall name given to protons, neutrons, and electrons.

• Subatomic particles

• Atoms

• Elements

• Energy levels

The same number of these subatomic particles makes atoms neutral.

• Neutrons and protons.

• Electrons and neutrons.

• Protons, electrons, and neutrons.

• Protons and electrons.

Name given to positively charged subatomic particles that sit in the nucleus of an atom.

• Electrons

• Atoms

• Neutrons

• Protons

Name given to neutral subatomic particles that are in the nucleus and have no charge.

• Neutrons

• Electrons

• Protons

• Atoms

Name given to negatively charge particles that sit on the electron shells or orbits of an atom.

• Electrons

• Neutrons

• Protons

• Atoms

Term given to a pure substance that consist entirely of one type of atom.

• Electrons

• Neutrons

• Element

• Atoms

An atom contains the same number of protons and _______.

• Neutrons

• Neutrons and electrons

• Electrons

• Electron shells

If carbon has 6 protons and 6 electrons, what is its atomic number?

• 6

• 12

• 36

• 0

Isotopes are atoms of the same element that differ in their number of what subatomic particle?

• Protons

• Electrons

• Electron shells

• Neutrons