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Question
- a. how can you tell if an atom has a negative charge? what type of ion is this?
b. how can you tell if an atom has a positive charge? what type of ion is this?
Brief Explanations
- For part a: An atom has a negative charge when it gains electrons. Electrons are negatively - charged particles. When the number of electrons is greater than the number of protons (protons are positively - charged), the atom has a net negative charge. This type of ion is called an anion.
- For part b: An atom has a positive charge when it loses electrons. When the number of protons is greater than the number of electrons, the atom has a net positive charge. This type of ion is called a cation.
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a. An atom has a negative charge when it has more electrons than protons. It is an anion.
b. An atom has a positive charge when it has more protons than electrons. It is a cation.