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Skye Statham English

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Chemistry
forming positive ions -
Metal atoms lose electrons from their outer shell when they form ions:
the ions formed are positive, with more protons than electrons
the ions formed have full outer shells
forming a negative ion -
The outer shell of non-metal atoms gains electrons when they form ions:
the ions formed are negative, because they have more electrons than protons
the ions formed have full outer shells
forming ionic bonds - Positively charged ions are called cations, and negatively charged ions are called anions. These ions can form when a metal reacts with a non-metal, by transferring electrons. The oppositely charged ions are strongly attracted to each other, forming ionic bonds.
why are Hazard symbols important ?
indicate the dangers associated with the substance inside
give information about how to work safely with the substance in the laboratory
what is evaluating risks -
the way the hazard causes harm
how likely it is that someone or something will be exposed to the hazard
how serious the effects of the hazard could b