atomic structure and periodic table 😉🎀🎀🧪

Question 1

what’s an isotope

Answer 1

same number of protons different number of neutrons

Question 2

where is the atomic number

Answer 2

the bottom

Question 3

what is relative atomic mass / mass number

Answer 3

number on the top

Question 4

how to calc relative atomic mass

Answer 4

percentage X amount / 100

Question 5

where are the metals and non metals on the periodic table

Answer 5

metals- left
non metals- right

Question 6

groups

Answer 6

alkali metals
transition metals
halogens
noble gasses

Question 7

what’s an alloy

Answer 7

mixture of different metals

Question 8

what is a molecule

Answer 8

group of atoms chemically bonded together

Question 9

what is a giant covalent structure and examples

Answer 9

molecules with many atoms
carbon
sulfur

Question 10

different examples of carbon atoms bonded

Answer 10

diamond
graphite

Question 11

what’s a compound

Answer 11

contains atoms of two or more different elements chemically bonded together

Question 12

different types of compound

Answer 12

covalent
ionic

Question 13

what type of bonding is ionic

Answer 13

metal and non mental ions

Question 14

what type of bonding is covalent

Answer 14

all non metals bonding

Question 15

where are electrons

Answer 15

in shells around nucleus
attraction to positively charged protons

Question 16

how to find out number of electrons in an element

Answer 16

atomic number

Question 17

J.J thompson

Answer 17

discovered electron
subatomic particles are evenly distributed in the atom
“plum pudding model”

Question 18

john dalton

Answer 18

atoms weee first described as solid spheres

Question 19

rutherford

Answer 19

alpha scattering experiment-mass concentrated at the centre. the nucleus is charged. most of the mass is in the nucleus,
most of the atom is empty space

Question 20

bohr

Answer 20

electrons are in shells orbiting the nucleus

Question 21

chadwick

Answer 21

discovered that there are neutrons in the nucleus

Question 22

simple distillation

Answer 22

separating a liquid from a solution

Question 23

fractional distillation

Answer 23

separating out a mixture of liquids
used to separate crude oil into fractions

Question 24

halogens

Answer 24

non mental
go down- less reactive
go down-melting and boiling points become higher

Question 25

noble gases

Answer 25

unreactive due to full outer shell
colourless gas at room temp
go down-boiling points increase
increase in number in electrons means greater intermolecular forces

Question 26

development of periodic table

Answer 26

-arranged by atomic mass
-some elements hadnt been found so put in the wrong group
- mandeleev left gaps for undiscovered elements
-he put them in order of atomic mass

Question 27

modern periodic table

Answer 27

-in order of atomic mass/proton number
-metals on the left non metals on the right
-group number shows electrons in outer shell
-predict the reactivity of metals

Question 28

alkali metals

Answer 28

-soft and very reactive (one electron)
-low density
-go down- more reactive
-form ionic compounds with no metals
-react with water, chlorine and oxygen

Question 29

mixtures

Answer 29

no chemical bonds
easy to separate

Question 30

chromatography

Answer 30

to separate out mixtures

Question 31

filtration

Answer 31

to separate solids from liquids

Question 32

evaporation

Answer 32

to separate a soluble salt from a solution

Question 33

crystallisation

Answer 33

to separate a soluble salt from a solution; slower method of separating a salt

Question 34

separating out salt from rock salt practical

Answer 34

1. grind mixture of rock salt
   2.add water and stir
2. filter the mixture leaving the sand in the filter paper
   4.evaporate the water from the salt, leaving the crystals

Question 35

transition metals

Answer 35

-strong,shiny and good conductors or electricity and heat
-make good catalysts
-form more than one ion
usually coloured
-compounds also usually coloured