Chemistry Review

In the process of covalent bonding, atoms share electrons. This means that

• Electrons from each atom are attracted to the nucleus of both atoms

• Protons and neutrons attract

• Atoms lose electrons and become ions

• Atoms gain electrons and become ions

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In the process of ionic bonding, ions come together because

• Opposite charges repel

• Positive and negative ions attract

• Salt is magnetic

• Like charges attract each other

True or False: In a covalent bond, electrons are shared between two atoms

• True

• False

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When an atom loses an electron, it forms a _____ ion.

• positive

• negative

• neutral

When an atom gains an electron, it forms a _______ ion.

• positive

• negative

• neutral

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An inert atom _________. (Select all that apply)

• resists bonding

• is stable

• typically has 8 electrons in outer energy level

• is highly reactive

The atomic mass of an element is

• The average mass of all the isotopes of the element

• A measure of the density of that element

• The mass of the most common isotope of that element

• The number of protons and electrons in the atoms of the element

The atomic number of an atom is

• the mass of the atom

• the number of protons added to the number of neutrons

• the number of protons

• negatively charged

The periodic table shows that a carbon atom has six protons. This means that a carbon atom also has

• six electrons

• six neutrons

• more protons than electrons

• an atomic mass that equals six

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What happens to particles when they are heated?

• They speed up and spread out

• They slow down and compress

• They stop moving

• They move closer together and speed up

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