1) metal react with a) non metal b) metal c) metal and non metal 2) metal react to form a ion a) negative b) positive 3) non metal react to form a ion a) negative b) positive 4) the two charge eachother a) attract b) repal 5) the positive and negative ion are held together by an force a) electrostatics b) attract c) repal 6) electron are and the atom becom an a) transferred  and ion b) sharred c) and gas 7) when it becom ion it always have a) square braket b) charge and round braket c) square braket and charge

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?