1. Why is Mg (carbonate and nitrate) the least thermally stable of the G2 elements ?
- Magnesium isn't the least thermally stable, Barium is.
- Magnesium forms radioactive carbonates and nitrates that are unstable and break down
- Magnesium has the smallest ionic radius as a 2+ cation so a greater polarising ability (more charge dense)
- Magnesium has the largest nuclear charge so can most easily pull apart the electron cloud
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Other questions in this quiz
2. What's a common test for the Hydrogen Halides?
- Turns Fehling's solution red
- Reacts with ammonia gas to form a dense white smoke of ammonium halide
- Form a white precipitate of Barium Halide when Barium Nitrate is added to a solution
- Turns damp red litmus blue, then beaches it white
3. What would you expect to observe when NaI reacts with H2SO4 ?
- Misty fumes of HI ; Purple fumes/black solid of I2 ; Choking gas of SO2 ; Yellow solid of S ; Eggy gas of H2S
- White crystalline solid of NaSO4 , Purple fumes of I2 , A gas that would relight a splint (O2) and dense white fumes of HI
- Misty fumes of HI and the residue of NaHSO4 only - it is the poorest recuder
- Brown fumes /orange liquid ; Choking gas
4. Which is the most electronegative element of Group 7?
5. What is the trend in solubility of the sulfates and hydroxides?
- They are more soluble down the group
- They are less soluble down the group
- Sulfates decreases down the group ; hydroxides increases
- Hydroxides decreases down the group, Sulfates increases