Science Chapter 6 – Flashcards
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A compound dossiers from a mixture because it
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Is held together by chemical bonds
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Which compound is formed from a right network of oppositely charged ions
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Salt
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Often atoms join so that each atom will have
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An outermost energy level that is full of electrons
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The bonds that hold atoms together behave most like
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Flexible springs
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An ionic bond is a bond that forms between
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Ions with opposite charges
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In which type of bond do atoms share electrons
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Covalent bonds
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The anion formed from an oxygen atom is called a
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Oxide ion
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The name for the compound with the formula Cr2O3 would be written as
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Chromium (II) oxide
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A carbon atom can bond to four other atoms because it has
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Four valence electrons
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Alcohols are organic compounds that contain
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Carbon, oxygen, and hydrogen
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Which compounds have carbon carbon double bonds
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Alkenes
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The rings of the DNA ladder are made up of
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Paired monomers
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Some polymers are elastic because they are made of
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Tangled chains
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What is an example of a compound
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Salt
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Atoms and ions are held together by
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Chemical bonds
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Which of the following models could be used to compare the sizes of atoms in a molecule
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Space filling
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There are strong bonds between the atoms on a piece of quartz. These bonds give quartz a
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High melting point
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The attraction between molecules tends to be ____ the attraction between ions
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Weaker than
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Which molecules are most strongly attracted to one another
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Water molecules
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Sugar has a lower melting point than salt because sugar is made of
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Molecules
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A hudrogen bond between water molecules is which of the following when compared with the bonds within an individual water molecule
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It is weaker
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A compound with only two atoms would not have a
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Bond angle
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Which of the following models would show the bond angle
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Ball and stick
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Atoms sometimes form bonds to
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Become more stable
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Copper atoms are held together by ____ bonds
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Metallic
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Oxygen atoms have sex electrons in their outer shells. When two oxygen atoms bond, they will form a ____ bond by ____ their electrons
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Covalent, sharing
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An ionic compound of calcium and chlorine would be names
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Calcium chloride
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A covalent compound made of copper and oxygen would be naked
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Copper (II) oxide
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The covalent compound N2O5 would be named
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Dinitrogen pentoxide
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The chemical formula for an ionic compound of potassium and oxygen is
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k2O
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The _____ formula of a compound is written in the simplest whole number ratio of atoms
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Empirical
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The formal C6H12O6 would be the ____ formula for glucose
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Chemical and molecular
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All organic compounds must contain the element
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Carbon
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The atoms in organic molecules are held together by _____ bonds
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Covalent o
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The atoms of propane are held together by ____ bonds
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Single
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Ethene differs from ethane in that is has
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Double bond
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An alcohol must contain a
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-OH group
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A _____ is a polymer that contains many different molecules of amino acids
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Glucose
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A polymer or sugar molecules is called a
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Carbohydrate
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A compound is held together by
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Chemical bonds
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In which substance do the molecules have the strongest attractions to one another
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Sugar and a solid
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In a metallic bond, the nucleus of one atom is attracted by a nearby atoms
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Electron
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The simplest organic compound is
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Methane
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Polymers are large organic molecules that are made of
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Repeating units
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The forces that hold different atoms or ions together are
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Chemical bonds
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Each molecule of table sugar contains
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12 atoms of carbon
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Gases take up a lot of space because gas molecules
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Are not attracted to one another
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Covalent bonds are formed between
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Non metal atoms
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Copper is a good conductor of electricity because its electrons
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Can move from atom to atom
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The name Dinitrogen tetrioxide tells you that this compound contains
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2 nitrogen and 4 oxygen atoms
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It do possible for different covalent compounds to have the same empirical formula because empirical formulas represent
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A total of all ionic bonds
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Alkanes are hydrocarbons that contain
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Carbon, hydrogen, and oxygen
