Explain the relationship of selected oxidation numbers to valence electrons for Groups 1, 2& 13-18. (Hint : 13-10=3) How can the atom's electron configuration be predicted on the basis of its location in the periodic table?

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.