Flashcards
Group 2
Cards in this deck (8)
- 1Atomic radius ________ as you go down the group. This is because...Increases
Because as you go down the group, the number of electron shells increases so the distance of the outer electron to the nucleus also increases - 2Melting point ________ as you go down the group. The __________ bonding weakens as the atom size ________.Decreases
metallic bonding
atom size increases
so there is a greater distance between the delocalised electrons and the positive ion nucleus; weaker electrostatic forces of attraction. - 3What happens to 1st ionisation energy as you go down Group 2*Decrease
*atom size increases so the outermost electron is successively further away from the nucleus.
*more shielding as you go down the group, so less electrostatic attraction. - 4The reactivity of Group 2 metals ________ as you go down the groupIncreases
as outermost electron further away and more shielded, so less electrostatic attraction, so easier to lose. - 5Why, when using magnesium ribbon, should you wipe it down with emery paper before using it in an experiment? Include equationsBecause Mg reacts slowly with O2 without a flame.
2Mg + O2 --> 2MgO
leaving a layer of MgO on the surface.
If used in a reaction, both Mg and MgO may react. Both have different reaction times and different products, giving a false result.
Mg + HCl --> MgCl2 + H2
MgO + HCl --> MgCl2 +H2O - 6Do group 2 metals burn in oxygen?Yes they do.
*Mg burn with white flame - 7What colour is MgO? What bonding? High or low boiling point?MgO is a white solid
High melting and boiling point due to its ionic bonding - 8Magnesium reacts differently in steam and warm water. Give the equation for its reaction with steam.Mg (s) + H20 (g) -->MgO (s) + H2 (g)
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- A level Chemistry (Inorganic Chemistry) Flashcards on Group 2, created by Anushka John on 25/11/2016.
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- Anushka John
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