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Study Cards for Mid-term
what we need to know for the mid-term 2011
25
Chemistry
8th Grade
02/01/2011

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Cards

Term
liquids shape and volume
Definition

shape- indefinite

volume- definite

Term
solids shape and volume
Definition

shape- definite

volume- definite

Term
gases shape and volume
Definition

shape- indefinite

volume- indefinite

Term
arrangement of atoms in a liquid
Definition
close together but with no order
Term
arrangments of atoms in a solid
Definition
close together and in order
Term
arrangments of atoms in gases
Definition
far apart with no order
Term
physical properties
Definition
a quality or condition of a substance that can be observed or measured without changing the substance's composition
Term
chemical properties
Definition
the ability of a substance to undego a specific chemical change
Term
examples of a physical property
Definition
hardness, color, conductivity, malleability
Term
examples of a chemical property
Definition
burn, rust,rot, decompose, ferment, explode, corrode
Term
compound
Definition
a substance that contains 2 or more elements which are chemically combined
Term
element
Definition
the simplest form of matter that retains its unique set of properties
Term
metric conversions
Definition

K H D meter leter gram d c m

Kilo (1000), Hecta (100), Deka (10), deci (0.1), centi (0.01), milli (0.001)

meter=length, gram=weight, liter=fluid

Term
Kelvin to Celcius
Definition
K-273=C
Term
Celcius to Kelvin
Definition
C+273=K
Term
nucleus components
Definition
neutrons and protons
Term
nucleus's charge
Definition

positive

protons make it positive

Term
how to determine number of protons
Definition
look at the atomic number
Term
how to determine number of electrons
Definition
look at the atomic number
Term
how to determine number of neutrons
Definition
subtract the atomic number from the atomic mass
Term
atomic number
Definition
the number of protons in an atom
Term
atomic mass
Definition
the number of protons and neutrons in an atom
Term
isotopes
Definition
atoms of the same element (because they have the same number of protons) but with different number of neutrons
Term
notation for writing an isotope
Definition
atomic weight in superscript and atomic number in subscript to the left of the symbol
Term
how to determine isotope abundance given average atomic mass
Definition
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