definitons

Question 1

Pure substance

Answer 1

consists of only one type of atom or molecule

Question 2

diatmoic molecule

Answer 2

molecules that consist of exactly two atoms

Question 3

molecule

Answer 3

two or more atoms that have been chemically bonded together

Question 4

decompostion reaction

Answer 4

a reaction in which a compound is broken down into a simpler compound or element

Question 5

element

Answer 5

a substance that cant be broken down into a simpler substance

Question 6

atom

Answer 6

the smallest unit elements are made off

Question 7

subatomic particles examples

Answer 7

electrons neutrons and protons

Question 8

pure substance

Answer 8

a substance that is made up of one type of atom or molecule

Question 9

electrolysis

Answer 9

a chemical reaction where electricity is used to decompose a compound

Question 10

solid gas and liquid

Answer 10

all matter

Question 11

inter and intra molecular forces

Answer 11

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.

Question 12

diffusion

Answer 12

the spontaneous spreading off particles from an area of high concentration to an area of low concentration

Question 13

density

Answer 13

amount of mass in a given volume of matter

Question 14

volume

Answer 14

amount of space and object takes up

Question 15

mass

Answer 15

measure of the amount of matter in an object

Question 16

gas pressure

Answer 16

force created by gas particles hitting the walls of their container

Question 17

products

Answer 17

substances that are produced in a reaction

Question 18

does water consist of two compounds

Answer 18

no, one compound

Question 19

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

Answer 19

atom

Question 20

valance

Answer 20

electrons in the outer most shell

Question 21

two properties of non metals

Answer 21

poor heat/electricity conductors and very high or low melting points

Question 22

properties of metals

Answer 22

malleable, good conductors of heat and electricity and can dull

Question 23

difference between compound and mixture

Answer 23

a compound has to be chemically separated into its elements, mixtures can be physically separated

Question 24

immiscible liquids

Answer 24

incapable of mixing

Question 25

what do intermolecular forces decide

Answer 25

The boiling point, melting point and density

Question 26

polarization

Answer 26

the initial repelling of a charged and neutral object then followed up by attraction after the positive or negative charge has been transferd because opposites attract

Question 27

valency

Answer 27

the amount of electrons that need to be added or subtracted to balance

Question 28

absolute zero

Answer 28

-273c/ 0 kelvins

Question 29

what does friction do

Answer 29

transfers electrons between objects