Chem 101 1-4

what is the study of matter and the changes it can undergo

anything that has mass and takes up space

amount of matter in a sample

has a definite shape and definite volume

has a indefinite shape- it takes the shape of its container- definite volume

has indefinite shape and volume

these are distinguishing characteristics of a substance used in its identification and description

what property is the boiling point, melting point, density examples of

what property is something that has the ability to change into something else

characteristics of a substance that describes how it undergoes or resists a change to form a new substance, penny rusting, paper burning

a process in which a substance changes it physical properties without a change in chemical composition, ice melting, alcohol evaporating

a process in which a substance changes its chemical composition, iron nail rusting, milk turning sour *forms a new substance*

cannot be broken down into simpler substance, have unique set of their own physical properties

combination of two or more elements that retain chemical identity, can be broken down

in a mixture there are two or more visible phases

in a mixture there is only one visible phase

pure substance that cannot be broken down into simpler pure substance by chemical means

pure substance that can be broken down into two or more simpler pure substances by chemical means

smallest particle of an element that still has the properties of the element

group of two or more atoms that are tightly bound together

this behaves a single distinctive particle

uses chemical symbols and subscripts to describe the quantity of each type of atom present in the molecule

no uncertainty, whole numbers

measurement numbers, have degree of uncertainty

all measurements have some degree of uncertainty or error, represented by

used to describe very large or very small number

the limit of chemical subdivision for matter

massive central core that contains protons and neutrons

the same number of protons but different mass number the number of neutrons changes

is the relative mass of average atoms of an element

on periodic table going across the row

on periodic tabel go down the column

what are the 8 groups on periodic table

attractive force that holds two or more atoms together

chemical bond formed through the transfer of electrons from one atom or group to another

chemical bond formed through the sharing of one or more electrons between two atoms

hold the metals together in a solid form

occur between a hydrogen atom and n o f

electrons in the outermost energy level of an element, they determine the bonding characteristics

symbols of the valance electrons for an element

atoms tend to gain/loose electrons to resemble a nobel gas, max of 8, metals typically loose electrons

charged atoms that have the stability of a nobel gas

positively charged loose an e-

negatively charged gain an e-

metal and non metal binary compound

two non metals binary molecular compound

the more valance electrons around an element the greater the..

the bonding pair(s) of electrons is shared equally

the bonding pair(s) of electrons is shared unequally

one atom gives up its electron to the other

covalently bonded atoms that carry a net charge

sum of the atomic masses of all atoms in a chemical formula

6.02x10^23, counting unit

mass of substance, in grams, that is equal to the formula mass