Are you in Mr Bedfords science class? Try a poster on the back of the toilet door - like, times tables, or memory cards!
All acids have hydronic ions.
it because m2 plus ions have two valence electrons in two shells instead of one
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One formula unit of MgBr2 has three ions; one Mg2+ ion and two Br- ions. One mole of MgBr2 formula units has one mole of Mg2+ ions and two moles of Br- ions, for a total of three moles of ions.
Ions made up of more than one atom are called polyatomic ions.
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ions like sulphate ions,carbonate ions etc...are the ions which contain more than one atom.
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Ions are atoms that have either gained or lost electrons. Ions are normally formed by chemical processes. For example the rusting of Iron yields various types of Iron Oxides. Iron metal and oxygen gas both become ions. So when an atom becomes an ion through chemistry it always has a counter-ion (one positive and one negative). Some ions can vary in their charge depending on the situation, for example Iron often has a 2+ charge but can also easily have a 3+ charge. However, this is not formally considered "an ion of ion."