AP Biology Topic 8

Which of the following describes covalent bonds?

• Bonds form because of opposite charges

• electrons are shared to fill outer electron shells

• Electrons are transferred between atoms

• Covalent bonds are magical

Which 4 elements make up most of all living matter?

• Carbon, Hydrogen, Nitrogen, Oxygen

• Carbon, Oxygen, Sodium, Potassium

• Carbon, Hydrogen, Calcium, Nitrogen

• Carbon, Oxygen, Nitrogen, Sulfur

When atoms share electrons unequally...

• a nonpolar covalent bond is formed.

• an ionic bond is formed.

• a polar covalent bond is formed.

• a hydrogen bond is formed.

A substance that cannot be decomposed into simpler substances by chemical means - made up of the same atoms

• atom

• element

• molecule

• organism

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The nucleus of an atom is made up of...

• Protons and Neutrons

• Neutrons and Electrons

• Protons and Electrons

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Energy of motion is which type of energy?

• Potential

• Kinetic

• Sound

• Gravitational

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Stored energy is called ______ energy.

• Kinetic

• Potential

• Pacific

• Safe

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Atoms gain lose, gain, or ______electrons to get a stable outer energy level.

• share

• split

• create

• destroy

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An ionic compound is held together by the _______--the force of attraction between opposite charges of the atoms.

• Covalent Bond

• Ionic Bond

• Synthetic Bond

• Molecular Bond

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Valence electrons are the...

• Innermost electrons

• Middle electrons

• Outermost electrons

• Any electrons

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