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Chemistry
Alkali Metals (Section 4)
Question | Answer |
---|---|
What are 4 properties of alkali metals? | Soft, low density, low melting point, highly reactive |
As you go down Group 1 of the periodic table, melting and boiling points ___________ | decrease |
As you go down Group 1 of the periodic table, the elements become _________ reactive | more |
Why are elements further down Group 1 more reactive? | Atoms get larger, as the number of shells increases. The outer most electron gets further away from the nucleus, meaning the attraction is weaker and the electron can be lost more easily |
Most ionic compounds formed with Group 1 metals tend to be ________ solids that __________ in water to form a ______________ solution | white, dissolve, colourless |
Alkali metal + water ---> ________+ ________ | metal hydroxide + hydrogen gas |
Alkali metal + chlorine -----> ____________ | (metal) chloride |
Sodium + oxygen ------> ________ OR __________ | Sodium Oxide or Sodium Peroxide (Na2O2) |
Potassium + oxygen ------> _________ OR __________ | Potassium Peroxide (K2O2) or Potassium Superoxide (KO2) |