cumulative test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What do atoms need to do to bond with each other? | They have to be nearly empty or nearly full.
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| What is the reason for atom bonding? | To have a full/stable outer shell.
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| How do atoms bond? | By losing or gaining electrons.
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| What are two examples of unfriendly atoms? | Half full outer shells and items with full outer shells.
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| What is an ionic bond? | when either a loss or gain of electrons is taking place.
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| What is an ion? | an atom that has a charge.
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| Atoms in their elemental state are... | neutral
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| _________are atoms with a positive charge. | cations
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| _________are atoms with a negative charge. | anions
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| physical properties can be observed without ________ ________ matter. | chemically changing
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| Chemical properties describe how a _______ _______ react with different substances. | substance interacts
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| Name six physical properties. | malleability, density, color, texture, solubility, mass.
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| Solids have ________ shape and ________volume. | definite, definite
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| In a solid, particles are ______ ________. | packed together.
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| _______ have indefinite shape and definite volume. | liquids.
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| _____ have __________ shape and __________ volume. | Gases, indefinite, indefinite.
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| A physical change has ____ ________ in identity of a substance. | no change
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| A chemical change has one or more ______ substances provided. | new
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| Freezing point is from liquid to ________. | solid
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| Melting point is from solid to ___________. | liquid
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| boiling point is _________ to _______. | liquid to gas.
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| condensation point is gas to ________. | liquid
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| sublimation point is ________ to ______. | solid to gas.
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| physical changes include... | tearing, crushing, phase changes
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| chemical changes include... | combustion, acid rain
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| The Law of Conservation of Mass states that mass cannot be ________ nor ____________. | created nor destroyed.
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| Define a family. | The number of valence electrons in an atom.
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| What is a period? | The number of energy levels in an atom.
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| How many electrons can each level hold? | 1st= 2 2nd=8 3rd=18
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| What is the term used for the electrons in the outermost shell or energy level? | valence.
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| After atoms bond and form chemical compounds, they... | react with other chemical compounds or atoms.
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| The chemical reaction indicates a _________ ________. | Chemical change
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| The Law of Conservation of Mass tells us that after reactants go through a _________ ________, the number of atoms in the _________ must be equal to the number of atoms in the _________. | chemical reaction, product, reactants.
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| The number of atoms on either side of the arrow must be ______. | equal.
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| We count the number of _________ on each side and use ___________ to __________ the equation. | atoms, coefficients, balance.
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| When atoms share electrons a _________ bond is taking place. | covalent
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| What do atoms form when they bond? | a compound
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| The formation of a compound is the result of a ________ ________ because a new substance with ____ __________ has been found. | chemical change, new properties.
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| What does the nucleus contain? | protons and neutrons.
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| What does the atomic number represent? | atomic mass minus protons
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| neutrons=_______minus__________ | atomic mass minus protons.
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| What is an atom? | The smallest particle into which an elemental can be divided and still be the same substance.
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| If the number of protons and electrons are not equal the atom becomes a _______ _________. | charged particle
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| What are some characteristics of metals? | shiny, good conductors, malleable, ductile.
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| What are some characteristics of metalloids? | semi conductors, shiny or dull, somewhat malleable or ductile.
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| What are some characteristics of nonmetals? | dull, poor conductors, unmalleable, brittle.
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