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masteringbiology
2 quiz
| Question | Answer |
|---|---|
| In a group of water molecules, hydrogen bonds form between _____. | the oxygen atom in one molecule and a hydrogen atom in another molecule |
| Which of the following subatomic particles has appreciable mass and lacks a charge? | neutron |
| When the proton number and electron number are unequal, the atom or molecule is an _____. | ion |
| Neon is chemically inert and tends not to form chemical bonds with other atoms. This is because it has _____ electron(s) in its outer shell. | 8 |
| Two atoms of the same element must have the same number of _____. | protons |
| To understand biology, we need to understand chemistry. Why? | Chemicals are fundamental to the structure and function of all living things. |
| How are ionic bonds formed? | In ionic bonds, one atom gives up an electron to a second atom. |
| Ionic bonds form when _____. | one atom transfers an electron to another atom |
| Because the molecules of water are farther apart in ice than in liquid water, _____. | ice is less dense, so it floats. |
| A polar covalent bond _____. | results in an unequal sharing of electrons |
| Which of the following molecules is a compound? | sugar |
| Sodium chloride (NaCl) dissolves in water because water molecules _____. | are polar |
| For most atoms, a stable configuration of electrons is attained when the atom _____. | has 2 or 8 electrons in its outermost shell |
| The most abundant compound on Earth is _____. | water |
Created by:
colecoe