Braineos2

kilogram

basic unit of mass

solid

definite shape and volume

B2Cl4

what is the formula for diboron tetrachloride

specific heat

the amount of heat needed to raise one gram of a substance by 1degree celcius

matter

anything that has mass and takes up space

chemical change

those characteristic properties of a substance that relate to changes in the comp of the substance or to its reaction with other substances

significant figures

the non place holding digits in a reported measurement

chemical formula

a representation of a chemical compound

alkali metals

on the periodic table group 1A is

theory

an explanation for observations that withstands peer review

gas

no definite volume or shape

falsifiable

a good hypothesis should be ___ which means that further testing could prove it wrong

BaCl2

what is the ionic formula formed for the compound formed by barium and chlorine

groups

the vertical rows on the periodic table

mass number

the sum of the number of neutrons and protons in an atom is

periods

the horizontal rows on the periodic table

atomic mass

the weighted average of the isotopes of an element

liter

basic unit of volume

heterogenous

a mixture whose properties vary throughout

exponent

in scientific notation the ___ shows how many spaces the decimal place has been moved to produce the final coefficient

homogenous

mixture whose properties are uniform throughout

calcium chloride

CaCl2

temperature

the measure of intensity of energy of the particles in a substance

precision

how close a set of measurements are to eachother

anion

a negatively charged ion is an

liquid

a state of matter that has no shape and a definite volume

type 2 ions

ionic compounds that contain metal atoms that can form sever cations

fahrenheit

the temperature scale where freezing point of water is 32degrees and the boiling point is 212

neutron

subatomic particle with no charge found in the nucleus of an atom

noble gases

on the periodic table, the last group o the right is called the

alkaline earth metals

group 2A

ions

charged particles that form when an atom either gains or loses electrons

meter

basic unit of length

characteristic properties

properties that can be used to identify a substance and distinguish it from other substances

calorie

the energy needed to raise 1 gram of water 1 degree celcius

density

the physical property __ is defined as the mass per unit volume

amu

a unit of mass that in one twelfth of the mass of carbon 12 atom

mole

avagadros number of unit particles

scientific law

a generalized statement about observations that summarizes experimental facts about nature

metalloids

on the periodic table the elements along the stair step are

protons

the atomic number tells you the number of

hallogens

group second from the right

conversion factor

a ratio of two equivalent quantities using different units

isotopes

atoms of a particular element that have different masses due to having different numbers of electrons

sulfur trioxide

SO3

accuracy

how close a set of measurements are to the true value

formula unit

the basic unity of ionic compounds and the smallest neutral collection of ions




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