Chapter 2 Chemistry of Life practice test questions correctly defined a+ guaranteed atom - n Ans the smallest unit of matter that cannot be broken down by chemical means (contains a nucleus with protons and neutrons and an electron cloud) Qs subatomi

Chapter 2 Chemistry of Life practice test
questions correctly defined a+ guaranteed

atom - n
Ans✔
the smallest unit of matter that cannot be broken down by chemical means
(contains a nucleus with protons and neutrons and an electron cloud)


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subatomic particles - n
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protons, neutrons, and electrons


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element - n
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a pure substance made of only one kind of atom and represented by a symbol such
as H for hydrogen


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compound - n
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substances made up of two or more atoms of different elements


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isotopes - n
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atoms of an element that contain a different number of neutrons


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, chemical bond - n
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force that joins atoms


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chemical formulas - n
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identify the elements in a compound and the proportion of that element


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molecule - n
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a group of atoms held together by covalent bonds


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covalent bond - n
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when 2 or more atoms share electrons to form a molecule


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hydrogen bond - n
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a weak chemical attraction between polar molecules


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polar molecule - n
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a molecule with unequal distribution of electrical charges (dissolve well in water)


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