Chemistry of Life 2.1

What 3 subatomic particles make up atoms?

• Isotopes, protons, covalent bonds
• quarks, quirks, compounds
• protons, neutrons, isotopes
• protons, neutrons, electrons

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A chemical ________ is a pure substance made entirely of 1 type of atom.

• element
• compound
• mixture
• blend

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The nucleus of an atom usually contains:

• protons and neutrons
• electrons
• electrons and protons
• isotopes

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The main types of chemical bonds are:

• ionic and subliminal
• covalent and hydrogenated
• ionic and covalent
• ionic and flourite

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A slight attraction between oppositely charged regions of nearby molecules are called:

• Van Der Waals forces
• ionic bonds
• covalent bonds
• hydrogen bonds

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The electrons involved in chemical bonds are called ___________ electrons.

• valence
• ionic
• Van Der Waals
• covalent

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Why is carbon an important building block for organic macromolecules?

• a carbon atom can form up to FOUR chemical bonds

• it is only found in living things

• it can form double bonds

• solid carbon is highly unstable and reactive

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Plant cell walls (fiber) is made of polysaccharide called?

• starch

• glycogen

• cellulose

• triglyercide

Isotopes of an element contain

• equal numbers of protons and neutrons
• the same number of protons but a different number of neutrons
• the same number of neutrons but a different number of protons
• the same number of protons but a different number of electrons

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Ionic bonds form when 

• electrons are shared equally between two atoms
• electrons are shared unequally between two atoms
• electrons are transferred from one atom to another
• slight attractions develop between oppositely charged regions of nearby molecules

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