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Science Test

cumulative

QuestionAnswer
What do atoms need to bond with each other? Nearly empty or nearly full
What is the reason for atom bonding? to have a full/stable outer shell
How do atoms bond? by losing or gaining electrons
What are two examples of unfriendly atoms? half full outer shells and atoms with full outer shells
What is an Ionic bond? when either a loss or gain of electrons is taking place
What is an Ion? an atom that has a charge
Atoms in their elemental state are... nuetral
_______ are atoms with a positive charge cations
_______are atoms with a negative charge anions
Physical properties can be observed without _______ ________ matter chemically changing
Chemical properties describe how a ______ ______ interacts with other substances substance interacts
Name six physical properties Malleability, density, color, texture, solubility, mass
solids have _____ shape and ______ volume definite, defenite
in a solid particles are ______ _________ packed together
_______ have indefinite shapes and indefinite volume liquids
________ have _______ shape and _________ volume gases, indefinite, indefinite
a physical change has ____ ______ in identity of a substance no change
a chemical change has one or more ________ substances provided new
freezing point is from liquid to _______ solid
melting point is from solid to _______ liquid
boiling point is from ______ to _________ solid to gas
condensation point is _____ to _______ gas to liquid
sublimation point is ______ to _________ solid to gas
physical changes include... tearing, crushing, phase changes
chemical changes include... combustion and acid rain
the law of conservation of mass states that mass can not be _______ nor ________ created nor destroyed
define a family the number of valance electrons inside a family
what is a period the number of energy levels in an atom
how many electrons can each level hold 2,8,18
What is the term used for the electrons in the outermost shell or energy level valance
After atoms bond and form chemical compounds they... react with other chemical compounds or atoms
a chemical reaction indicates a _____ _________ chemical change
The Law of Conversation 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
The number of atoms on either side of the arrow must be _________ equal
We count the number of ______ on each side and use _______ to _______ the equation atoms, coefficients, balance
When atoms share electrons a _______ is taking place covalent bond
Why is the covalent bond the strongest type of bond? because molecules are formed
What do atoms form when they bond? a compound
the formation of a compound is the result of a ________ ________ because a new substance with ____ ________ has been formed chemical change, new properties
What does the nucleus contain? protons and nuetrons
What does the atomic number represent? protons and electrons
Nuetrons = _____ minues _________ Atomic mass minus protons
What is an atom? the smallest particle into which an element can be divided and still be the same substance
If the number of protons and electrons are not equal the atoms becomes a _______ ___________ charged particle
What are some characteristics of Metals? shiny, good conductors, malleable, ductile
What are some characteristics of Metalloids? emi conductors, shiny or dull, somewhat malleable or ductile
What are some characteristics of Nonmetals? dull, poor conductors, unmalleable, britttle
Created by: andrekat