C2 periodic table

Question 1

current arrangement of periodic table

Answer 1

groups- properties of elements/ number of electrons in outer shell
periods- increasing atomic number

Question 2

mendeleev

Answer 2

left gaps for undiscovered elements
made property predictions for undiscovered
predictions were correct
table accepted by scientific community

Question 3

noble gases

Answer 3

unreactive - very stable electron arrangement

Question 4

group 1 properties

Answer 4

lose one electron
increase reactivity going down the group
low density
float on water
m + b points decrease going down the group

Question 5

group 1 reactions

Answer 5

vigorous 
fizzing,floating
hydrogen produced
metal hydroxide produced
form 1+ ions

Question 6

group 7 properties

Answer 6

toxic non- metals
low m+ b points
gain one electron (1- ion)
poor heat and electrical conductors
coloured vapours

Question 7

group 7 reactions

Answer 7

react w non metals ( share pair of electrons)
form covalent compounds
more reactive halogen displaces less reactive one
reactivity increases going up the group

Question 8

electrostatic attraction factors

Answer 8

distance between outermost electrons and nucleus
number of occupied inner shells ( creates shielding effect)
size of positive charge of nucleus
(nuclear charge)

Question 9

transition elements properties

Answer 9

much higher M point + density compared to alkali metals

stronger and harder than AM

Question 10

transition elements reactions

Answer 10

less reactive than AM
do not react vigorously with oxygen or water
form ions with different charges, compounds often coloured
important industrial catalysts