Welcome to the Quiz!
This quiz contains 5 questions from a mix of 1 subtopics.
positive / negative / bigger / smaller / shell
Atoms need a full outer of electrons in order to be stable. One way they can achieve this is by gaining or losing electrons.
Those that gain electrons become ions with a charge, whilst those that lose electrons become ions with a charge.
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Magnesium loses electrons to become an ion. Complete the equation below:
➔ Mg2+ + e-
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Choose the correct equation for the ionisation of a bromine atom:
Br + 2e- ➔ Br2-
Br + e- ➔ Br-
Br ➔ 2e- + Br-
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Atoms in group 5 have electrons in their outer shell. This means they need to gain electrons to be stable, forming an ion with a charge of .
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more / less / time / energy
Atoms which need to gain or lose only 1-2 electrons are likely to become ions, compared to those which need to gain or lose 3-4.
This is because gaining or losing electrons requires a lot of .
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