group 2 3.2.2 in papers 1 + 3 Flashcards
(9 cards)
1
Q
whats the trend in atomic radius down the group?
A
- increases
- electron number increases so the number of shells do
2
Q
whats the trend in I.E down the group?
A
- decreases
- shielding increases and electrons become further away from the nucleus
3
Q
whats the trend in mpt down the group?
A
- decreases
electrons get further away from the positive nucleui as atoms get bigger, less attraction between, metal ions and delocalised electrons
4
Q
whats the trend in reactivity with water down the group?
A
- increases
2 electrons are lost more easily from Ba than Ca as the outer electrons are further from the nucleus and experience more shielding, so attraction decreases
5
Q
whats the trend in solubility down the group with metal hydroxides?
A
- increases
- Mg0H2 is insoluble
Ca and Mg are solids others are aqueous
6
Q
whats the trend in solubilty down the group with metal sulphates?
A
- decreases
- Mg is the only aqueos one rest are solids
- Sr, Ba, Ra are insoluble
7
Q
what is observed in Mg, Ca, Sr, Bacl2 when reacted with NaOH?
A
mg + ca = white percipitate
ba + sr = colourless solution
8
Q
what is observed in Mg, Ca, Sr, Bacl2 when reacted with H2SO4?
A
mg + ca = colourless solution
sr + ba = white percipitate
9
Q
what do u add to test for sulphates?
A
add HCL + BaCl2
