Atomic structure and periodic table

Question 1

alkali metals

Answer 1

elements in group 1

Question 2

atom

Answer 2

smallest part of an element

Question 3

atomic nucleus

Answer 3

centre of atom with protons and neutrons

Question 4

atomic number

Answer 4

number of protons in nucleus

Question 5

chromatography

Answer 5

separation technique used to separate a mixture

Question 6

compound

Answer 6

substance made up of 2 or more types of atoms chemically combined together

Question 7

crystallisation

Answer 7

a seperation technique used to produce crystals from a solution

Question 8

displacement

Answer 8

a chemical reaction where a more reactive element displaces a less reactive one

Question 9

electron

Answer 9

negatively charged subatomic particle

Question 10

element

Answer 10

a substance made up of one type of atom

Question 11

filtration

Answer 11

a separation technique to separate solids from liquids

Question 12

fractional distillation

Answer 12

method of seperating a mixture of substances according to their different boiling points

Question 13

halogens

Answer 13

elements in group 7

Question 14

ion

Answer 14

atom or molecule with an electrical charge from loss or gain of electrons

Question 15

isotopes

Answer 15

atoms of the same element with a different number of neutrons

Question 16

mass number

Answer 16

total number of protons and neutrons in nucleus

Question 17

metals

Answer 17

elements that react to form positive ions

Question 18

mixture

Answer 18

2 or more elements or compounds not chemically combined together

Question 19

neutron

Answer 19

neutral subatomic particle in the nucleus

Question 20

non metals

Answer 20

elements that react to form negative ions

Question 21

proton

Answer 21

positively charged subatomic particle

Question 22

relative atomic mass

Answer 22

an average value that takes account of the abundance of isotopes of the element

Question 23

simple distillation

Answer 23

a separation technique where 2 liquids are separated by their different boiling points

Question 24

physical properties of transition metals compared to group 1

Answer 24

harder
stronger
higher melting points
higher density
less reactive

Question 25

physical comparison of group 1 metals to transition

Answer 25

softer
lower density
more reactive

Question 26

chemical difference transition metals to group 1

Answer 26

ions with different charges
coloured compounds
useful catalysts

Question 27

chemical differences of group 1 to transition

Answer 27

colourless, white compounds
not used as catalysts
ions with same charge