Group 2 Metals

HideShow resource information
  • Created by: Emma
  • Created on: 18-03-14 19:38
Describe the Bonding present in solid group 2 metals
Metallic bonding. Strong electrostatic attraction between positive ions and negative delocalised electrons.
1 of 15
Define Electronegativity
The power of an atom to attract a bonding pair of electrons in a covalent bond.
2 of 15
State the trend in electronegativity down Group 2
Decreases.
3 of 15
Explain the trend in electronegativity down Group 2
Atomic radius increases as the bonding electrons are in higher energy levels and are therefore further from the nucleus and more shielded so attraction weakens.
4 of 15
Equation for reaction of Strontium with water, and suggest an approx. value for the pH of the resulting solution
Sr + 2H2O ---> Sr(OH)2 + H2
5 of 15
What is seen when an aqueous solution of barium chloride is added to dilute sulphuric acid and write an equation for the reaction occurring
White ppt will form. Ba2+ + SO42- ---> BaSO4
6 of 15
What is the trend in reactivity down the group 2 metals?
Increases.
7 of 15
What are the conditions under which magnesium reacts rapidly with water.
Water should be in gaseous stage.
8 of 15
Equation for the reaction of magnesium with water.
Mg + H2O ---> MgO + H2
9 of 15
State the trend in atomic radius down group 2 from Be to Ba and explain it.
Increases. There are more electron shells in each successive element as you go down the group.
10 of 15
State and explain the trend in melting points down group 2 from Be to Ba.
Decreases. The metallic bonding gets weaker as there is more nuclear shielding due to the extra electron shells which cause the electrostatic attraction between the positive ions and delocalised electrons to also weaken.
11 of 15
State the trend in reactivity with water of the elements down group 2 from Be to Ba.
Increases.
12 of 15
Equation for the reaction of magnesium with steam.
Mg(s) + H20(g) ---> MgO(aq) + H2(g)
13 of 15
Equation for the reaction of strontium with water.
Sr(s) + H2O(l) ---> Sr(OH)2(aq) + H2(g)
14 of 15
What is the formula of the least soluble group 2 sulphate? What is one use of it?
BaSO4. Barium meal used in x-rays.
15 of 15

Other cards in this set

Card 2

Front

Define Electronegativity

Back

The power of an atom to attract a bonding pair of electrons in a covalent bond.

Card 3

Front

State the trend in electronegativity down Group 2

Back

Preview of the front of card 3

Card 4

Front

Explain the trend in electronegativity down Group 2

Back

Preview of the front of card 4

Card 5

Front

Equation for reaction of Strontium with water, and suggest an approx. value for the pH of the resulting solution

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Group 2 Metals resources »