Periodic Table

Question 1

Define periodicity

Answer 1

trends in periodic table

Question 2

Periods in a periodic table

Answer 2

horizontal row

Question 3

Define groups in a periodic table

Answer 3

vertical columns

Question 4

Why metals become more reactive going down a group (4)

Answer 4

atom bigger as go down

electrons farther from nucleus

electrostatic force of attraction weaker

easier for valence electron to be removed

Question 5

Define metalloids

Answer 5

elements with characteristics of metals and non-metals

Question 6

Properties of metals (6)

Answer 6

large atomic radius

conduct heat/electricity

shiny

malleable

shiny

high melting/boiling point

Question 7

Properties of non-metals (5)

Answer 7

smaller atomic radius

no conduction

low melting/boiling point

brittle

dull

Question 8

What do elements in the same period have the same of

Answer 8

same number of electron shells

Question 9

Why non-metals less reactive as they go down a group (4)

Answer 9

atom bigger as go down

electrons farther from nucleus

weaker electrostatic force of attraction

harder for atom to accept electrons

Question 10

Define a mole (2)

Answer 10

amount of substance

6.02 x 10^23 particles

Question 11

Avogadro’s constant

Answer 11

6.02 x 10^23 particles

Question 12

Formula for number of moles (2)

Answer 12

mass(g)/Mr (relative atomic mass)

concentration(mol/dm^3) x volume (dm^3)

Question 13

Formula for volume of gas under room pressure/temperature

Answer 13

moles x 24dm^3

Question 14

Volume which a mole of gas occupies in room temperature/pressure

Answer 14

24dm^3

Question 15

Properties of group 1 metals (5)

Answer 15

soft to cut

shiny but react with air quickly

relatively low melting/boiling points

relatively low density

reactive

Question 16

Melting point trend of alkali metals

Answer 16

decreases as you go down

Question 17

Density trend of alkali metals

Answer 17

density increases as you go down

Question 18

Colour of lithium flame

Answer 18

red

Question 19

colour of sodium flame

Answer 19

orange/yellow

Question 20

colour of potassium flame

Answer 20

lilac

Question 21

Alkali metal reaction with air

Answer 21

metal + oxygen –> metal oxide

Question 22

Alkali metal reaction with water

Answer 22

metal + water –> metal hydroxide + hydrogen

Question 23

Alkali metal reaction with halogen

Answer 23

metal + chlorine –> metal chloride

Question 24

How metals react with water (4)

Answer 24

react vigorously

produce effervescence

float on surface, moving rapidly

make water alkaline

Question 25

Halogen colours (4)

Answer 25

fluorine - pale-yellow gas

chlorine - pale-green gas

bromine - red-brown liquid

iodine - black, shiny solid

Question 26

Halogen reaction with water

Answer 26

halogen + water –> hydrochloric acid + halogen [ending in ic] acid

Question 27

Colour of chlorine solution (reaction with water)

Answer 27

pale yellow

Question 28

Colour of bromine solution (reaction with water)

Answer 28

orange

Question 29

Colour of iodine solution (reaction with water)

Answer 29

yellow/brown

Question 30

Halogen properties (4)

Answer 30

diatomic

colour becomes darker as you go down period

density increases as you go down period

melting point increases as you go down period

Question 31

Define displacement

Answer 31

more reactive element takes less reactive element’s place

Question 32

Properties of noble gases (2)

Answer 32

inert/unreactive

monoatomic

Question 33

Properties of transition metals (6)

Answer 33

most have high density

high melting points

not very reactive

forms coloured compounds

used as catalysts

have more than 1 valence electron in outer shell