I haft to know this answer for tomorrow because i have a science test and that's gonna be one of the questions except the test question will look like this "Which family of elements will oxygen react with? Why?" But i already know part of the answer which is akaline earth metals, but i don't know why. Do you guys know?
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Oxygen is highly reactive. If you are in first year science
(grade 9), then it is simply because oxygen requires two electrons and alkaline earth metals dispose of two.
(grade 9), then it is simply because oxygen requires two electrons and alkaline earth metals dispose of two.
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The electronic configuration of Group 2 is [ ] ns^2. It does in fact cost quite a lot of energy to form M^2+ (and O^2-) but the lattice energy of M^2+O^2- is HUGE because it depends on Z+×Z- (= 4) and more than compensates for the energy need to form the constituent ions. For NaCl Z+×Z- = 1. So something like MgO will have ~4X the lattice energy of NaCl.
UMgO = 3791, UNaCl = 790 kJ mol^-1
UMgO = 3791, UNaCl = 790 kJ mol^-1