Biology Ch. 2 - Weber

What is the charge of a proton?

• +

• -

• neutral

What particles are found in the nucleus of an atom?

• protons

• neutrons

• protons and neutrons

• electrons

Which particle has a negative charge?

• proton

• neutron

• electron

The space surrounding the nucleus of an atom contains

• neutrons

• protons

• electrons

• ions

If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number would be

• 7

• 11

• 3

• 4

Isotopes are atoms of the same element with the same number of protons and

• a different number of electrons

• a different number of neutrons

• the same number of neutrons

• a different number of protons

A covalent bond is formed as a result of

• transferring electrons

• transferring protons

• sharing electrons

• sharing neutrons

Which is an accurate description of the chemical makeup of water?

• one atom of sodium and one atom of chlorine

• one atom of hydrogen and two atoms of oxygen

• one atom of hydrogen and one atom of oxygen

• two atoms of hydrogen and one atom of oxygen

Which term describes a substance formed by the combination of 2 or more elements in definite proportions?

• isotope

• ion

• compound

• element

What is a valence electron?

• Outermost electrons

• All electrons

• Only the inner electrons

• The ones with a charge