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27 Cards in this Set
- Front
- Back
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True or False
Atoms have a positive charge |
False, atoms are neutral |
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True or False
An atom that gains or loses one or more electron is called an ion |
True |
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True or False
An atom with more electrons has a positive charge. |
False, more electrons makes it negative. |
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True or False
Adhesion is an attraction between different substances. |
True |
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True or False
An element is made up of more than one kind of aton |
False, an element is only one atom |
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True or False
Ionic bonds form between two negatively charged particle |
False, ionic farms form from opposite charges (a negative and a positive) |
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True or False
A colvalent bond form between two atoms that chard elections to form a molecule. |
True |
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True or False
The ability of water to retain heat helps cells maintain homeostasis. |
True. |
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True or False
Nonpolar molecules dissolve well in water. |
False, because they don't interact well with water molecules. |
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Water molecules attract non polar molules suck as oil |
False, Serperated, don't attract |
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Atoms are composed of
a) protons b) electrons c) neutron d) all of the above |
d) all of the above |
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The electrons of an atom occupy the space... |
the space surrounding the nucleus |
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The smallest particle of matter that can retain the checmincal proper of carbon is a(n).... |
carbon atom |
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A substance that is composed of only one type of atom is called a(n)... |
element |
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All matter is composed of.... |
atoms |
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A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a.. |
polar molecule |
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A chemical formua shows.... |
the kinds of elements found in a compound |
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ionic bonds form between... |
monlecules that have opposite charges |
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The bond formed when two atoms share a pair of electrons is called a(n)... |
covalent bond |
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Water is important to life because
a) it surrounds all cells b) is found inside the cells c) includes the shape of the cell membrane d) all of the above |
d) all of the above |
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Nonpolar molecules have
a) positive poles b) negative poles c) both negative and positive d) neither negative or positive poles |
d) neither negative or positive poles |
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When placed in the same container oil and water don't mix together because... |
water is a polar and oil is a non polar |
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Acidic solutions have a PH that is....
a) less than 7 b) 7 c) 7-14 d)8-14 |
a) less than 7
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Due to the polarity of water, compounds that dissolve best in water contain
a) ionic bonds b) polar bonds c) neither ionic or polar bonds d) bother ionic and polar bonds |
d) both ionic and polar bonds |
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Water is a polar molecule because... |
different parts of the molecule have slightly different charges |
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Hydrogen ions, H+, react with Hydroxide ions, OH, to form... |
Water |
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Sharing electrons in the outer energy levels of two atoms occurs in... |
Covalent bonds |
