Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/77

Click to flip

77 Cards in this Set

  • Front
  • Back
accuracy
the closeness of a measurement
chemical property
ANY PROPERTY OF A SUBSTANCE THAT CANNOT BE STUDIED WITHOUT CONVERTING THE SUBSTANCE INTO SOME OTHER SUBSTANCE
compound
a substance composed of atoms of two or more elements chemically united in fixed proportions
chemistry
the study of matter and the changes it undergoes
density
the mass of a substance divided by its volume
macroscopic property
measured directly
extensive property
a property thta depends on how much matter is being considered
Kelvin
the SI base unit of temperature
law
a concise verbal or mathematical statement of a relationship between phenonmena that is always the same under the same conditions
liter
the volume occupied by one cubic decimeter
heterogeneous mixture
indiv. compon. of a mixture remain physically separated and can be seen as separate components
homogeneous mixture
the composition of a mixture after sufficient stirring, is the same throughout the solution
hypothesis
a tentative explanation for a set of observations
intensive property
a property that does not depend on how much matter is being considered
SI
International system of units system of units based on metric units
mass
a measure of quantity of matter
matter
anything that occupies space and possesses mass
microscopic property
properties that cannot be measured directly without the aid of a microscope or other special instrument
mixture
a combination of two or more substances in which the substances retain their identity
physical property
any property of a substance that can be oberved without transforming the substance into some other substance
precision
the closeness of agreement of two or more measurements of the same quantity
qualitative
thhe generaly observations
quantitative
compising numbers obtained by varoius measurements of the systems
scientific method
a systematic approach to research
significant figures
fthe number of meaningful digits in a meausre or calculated quantity
substance
a form of matter that has a definite or contstant compostiion
theory
a unifying principle that explains a body of facts and the laws that are based on them
volume
it is the length cubed
weight
the force of gravity exerts on an object
acid
a substance that yields hydrogen iions when dissolved in water
allotrope
the group 2a elements
alpha particles
(alpha rays) helium ions with a positive charge of 2+
alpha rays
same
anion
an on with a net negative charge
atom
the basic unit of an element that can enter into chemical combinations
atomic number (Z)
the number of protons
base
a substance that yields hydrozide ions (OH)
beta particles
(beta rays)
beta rays
electrons
binary compound
compounds formed from just two elements
cation
an ion with a positive charge
chemical formula
an expression showing the chemical compostion of a compund in terms of the symbols for the atoms of the elemtns involved
diatomic molecule
a molecule that consists of two atoms
electron
negative positron
empirical formula
an xpression shwoing the types of elements present and the ratios of the different kinds of atoms
families
the elements in a vertical column of the periodic table
gamma rays
high energy radiation
groups
the lements in a vertical column of the period table
halogens
the nonmetallic elemtns in Group 7a
hydrate
compounds that have a specific number of water molecules attached to them
ion
an atom or a group of atoms that has a net positive or negative charge
ionic compound
any neutral force that holds ions together in an ionic compound
isotope
atoms having the same bumber of protons but diff. neutrons
Law of conservation of mass
matter can be neither created or destroyed
Law of definite proportions
different samples of the same compound always cotain its constituent elemtns in the same proportions by mass
Mass number
the total number of netrons and protons present in the nucleus of an atom
Law of multiple proportions
if two elemtns can comvine to form more than one type of compound the masses of one element that combine with a fixed mass of the other element are in ratios of small whole numbers
metal
elemts that are good conductors of heat and electricity and have the tendency to form positive iions in ionic compounds
metalloid
an element with properties intermediate between those of metals and nonmetals
molecular formula
an expression showing the exact numbers of atoms of each elemnt in a molecule
molecule
an aggregate of at leat two atoms in a definite arrangements held together by special forces
monatomic ion
an ion that contains only one atom
neutron
netural partical
Noble Gases
nonmetallic elemtns in group8a
nonmetal
elements that are usually poor conductors of heat and electricty
nucleus
the cetnral core of an atom
oxoacid
an acid contained hydrogen oxygen and another element
oxoanion
an anion derived from an oxacid
period
a horizontal row of the periodic table
Periodic Table
elements
polyatomic ion
an ion that contains multiple atoms
polyatomic molecule
a molecule containing more than one atom
proton
single positive electric charge
radiation
the emission and transmssion of energy through space in the form of particles and or waves
radioactivity
the spontan. breakdown of an atom by emission of particles and or radiation
structural formula
a chem. formula that shopws how atoms are bvonded to one another in a molecule
ternary compound
compunds consisting of three element