stuff idk

Question 1

seiving

Answer 1

mixture is passed through sieve, small particles pass through while large particles stay

Question 2

filtration

Answer 2

pored into a filter paper. liquid goes through while solid remains as residue

Question 3

vaccum fitration

Answer 3

faster than regular filtration. the funnel is usually ceramic with a flat base and vertical sides. base has holes for liquid to go through. flat filter paper at bottom of funnel. then placed in vaccum flask which is a conical flask with a rubber seal and side arm for vaccum tube.

Question 4

decantation

Answer 4

pouring liquid from settled sediment

Question 5

seperation funnel

Answer 5

when immiscible liquids are in a flask, less dense liquid floats to top. tap opens and dense liquid flows out do the seperate

Question 6

centrifiguration

Answer 6

spinning a mixture rapidly can speed up the sedimentation process and extract finer particlesthat may or may not settle out naturally

Question 7

evaporation

Answer 7

liquid is boiled until just solid is left

Question 8

distillation

Answer 8

mixture is placed in round bottom flask and boiled. vapour rises up flask then goes into water cooled condenser. vapor condences back to liquid (distillate) collected in beaker

Question 9

fractional distillation

Answer 9

mixture is heated and components or fractions with different boiling points rise up fractionating collumn to different hieghts. lowest boiling point goes to top anf highest boiling point stays low

Question 10

electostatic seperation

Answer 10

mixture in magnetic feild. differently charged particles will be attracted or repelled and follow different paths to be caught seperately

Question 11

magnetic seperation

Answer 11

a magnet is used to take out magnetic substance

Question 12

chromotography

Answer 12

seperates liquids or gasses based off their differing affinity for various materials present in chromatography apparatus

Question 13

heterogeneous

Answer 13

diverse, different. posesses 2 or more different phases in the same sample, eg suspension

Question 14

homogeneous

Answer 14

uniform. components uniformly distributed throughout substance, eg a solution

Question 15

electronegativity

Answer 15

ability of an atom to gain electrons . decreases down a group as the core charge is the same and number os shells increase. increases left to right across period because # of shells remain the same but core charge increases

Question 16

democritus

Answer 16

beleived all substances were made from atoms the final peice of matter that was invisible to the eye

Question 17

dalton

Answer 17

explained his observations of of chemical reactions in terms of tiny particles he called atoms. thought all matter was made up of atoms and they all had different weights.

Question 18

thompson

Answer 18

used a cathode ray to discover that particles flow from negative electrodes to positive electrodes and stream of particles is repelled by other negative electrodes. subatomic particles.

Question 19

rhutherford

Answer 19

fired positively charges particles at gold foil. concluded most of an atom must be empty to allow most particles to pass through. nucleus positive charge deflected particles. surrounded by negative charge electrons

Question 20

bohr

Answer 20

quantum theory energy levels flame test

Question 21

chadwick

Answer 21

discovered neutrons

Question 22

calculate relative atomic mass

Answer 22

mass of individual isotope of each element compared to c12 standard.

Question 23

octet rule

Answer 23

acheive 8 electrons in outer shell

Question 24

electromagnetic radiation/spectrum

Answer 24

visible light and the light spectrum

Question 25

core charge

Answer 25

is the number perios they are, essentially