Model Draw models to represent the formation of the positive calcium ion and the negative bromide ion.

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Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.

Ibelieve it's dna hope this out at least

Answerheavy water or deuterium oxide.