Test Revision

Question 0

compounds

Answer 0

combined or joined atoms and molecules

Question 1

elements

Answer 1

amost basic form of matter, each element only contains one tyoe of atom

Question 2

molecules

Answer 2

atoms bonded together

Question 3

mixture

Answer 3

contains different elements and compounds that are not actually bonded together, can be separated by techniques such as filtration.

Question 4

electronic configuration

Answer 4

can be drawn or written shows number of electrons and their arrangement

Question 5

Ionic compounds

Answer 5

accure when metal ions and non metal ions are chemically combined and undergo a chemical reaction, these are not easily reveresed.

Question 6

ions

Answer 6

form when atoms gain or looseelectron, they can be positively of negatively charged.

Question 7

cations

Answer 7

positively charged ions

Question 8

anions

Answer 8

negatively charged ions.

Question 9

isotopes

Answer 9

fare atoms of the same element but with different mass numbers

Question 10

alpha decay

Answer 10

ejection of 2 protons and 2 neutrons (equivalent of a helium atom) sideways fish.

Question 11

beta decay

Answer 11

is when neutron turns to proton, though the particle is negatively chrarged, when this occurs a new element if formed.

Question 12

gamma decay

Answer 12

involves emission of electromagnetic waves, they are like an x-ray but far more powerful. (down fish Y)

Question 13

reactants

Answer 13

substnce that react in a chemical reaction.

Question 14

products

Answer 14

substances produced in a reaction

Question 15

exothermic

Answer 15

reaction that gives out energy

Question 16

endothermic

Answer 16

a reaction that absorbs energy from surroundings

Question 17

physical change

Answer 17

substance change but nothing new is created

Question 18

chemical change

Answer 18

new substance formed

Question 19

signs of change

Answer 19

heat/tempurature gas colour solid appears

Question 20

laws of conservation mass

Answer 20

matter cannot be created or destroyed in a chemical reaction

Question 21

law of constant proportions

Answer 21

a compound will always contain he same proportions

Question 22

types of reaction

Answer 22

combinations reactions decomposition reactions acid + metal acid + base acid + carbonate combustion reactions

Question 23

half life

Answer 23

involves radiostopes when they become unstable, it is the time it takes for the nuclei to decay

Question 24

periodic table

Answer 24

metals give to non-metals never metalloids or noble gases metals = cations non-metals = anions

Question 25

groups

Answer 25

G1 = alkali metals G2 = alkali earth metals G7 = halogens G8 = noble gases above aluminium down- metalloids 21 - 30 transition metals

Question 27

amost basic form of matter, each element only contains one tyoe of atom

Answer 27

elements

Question 28

combined or joined atoms and molecules

Answer 28

compounds

Question 29

atoms bonded together

Answer 29

molecules

Question 30

contains different elements and compounds that are not actually bonded together, can be separated by techniques such as filtration.

Answer 30

mixture

Question 31

can be drawn or written shows number of electrons and their arrangement

Answer 31

electronic configuration

Question 32

accure when metal ions and non metal ions are chemically combined and undergo a chemical reaction, these are not easily reveresed.

Answer 32

Ionic compounds

Question 33

form when atoms gain or looseelectron, they can be positively of negatively charged.

Answer 33

ions

Question 34

positively charged ions

Answer 34

cations

Question 35

negatively charged ions.

Answer 35

anions

Question 36

fare atoms of the same element but with different mass numbers

Answer 36

isotopes

Question 37

ejection of 2 protons and 2 neutrons (equivalent of a helium atom) sideways fish.

Answer 37

alpha decay

Question 38

is when neutron turns to proton, though the particle is negatively chrarged, when this occurs a new element if formed.

Answer 38

beta decay

Question 39

involves emission of electromagnetic waves, they are like an x-ray but far more powerful. (down fish Y)

Answer 39

gamma decay

Question 40

substnce that react in a chemical reaction.

Answer 40

reactants

Question 41

substances produced in a reaction

Answer 41

products

Question 42

reaction that gives out energy

Answer 42

exothermic

Question 43

a reaction that absorbs energy from surroundings

Answer 43

endothermic

Question 44

substance change but nothing new is created

Answer 44

physical change

Question 45

new substance formed

Answer 45

chemical change

Question 46

heat/tempurature gas colour solid appears

Answer 46

signs of change

Question 47

matter cannot be created or destroyed in a chemical reaction

Answer 47

laws of conservation mass

Question 48

a compound will always contain he same proportions

Answer 48

law of constant proportions

Question 49

combinations reactions decomposition reactions acid + metal acid + base acid + carbonate combustion reactions

Answer 49

types of reaction

Question 50

involves radiostopes when they become unstable, it is the time it takes for the nuclei to decay

Answer 50

half life

Question 51

metals give to non-metals never metalloids or noble gases metals = cations non-metals = anions

Answer 51

periodic table

Question 52

G1 = alkali metals G2 = alkali earth metals G7 = halogens G8 = noble gases above aluminium down- metalloids 21 - 30 transition metals

Answer 52

groups