2025 - s2 Exam Chemistry Flashcards

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Alkali metals

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An atom found in group 1 of the periodic table and are highly reactive as they have one electron that they need to lose to have a full outer shell.

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Alkaline earth metals

Back

An atom found in group 2 of the periodic table.

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Anions

Back

A negatively charged particle as a result of gaining electron/s.

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Aqueous solution

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A solution in which a water is the solvent and a solute is dissolved in it.

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Atomic number

Back

The number of protons of an atom.

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Catalyst

Back

A substance that increases the rate of reaction but is not used up in the reaction.

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Cations

Back

A positively charged ion as a result of losing electron/s.

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Chemical reaction

Back

The process that involves rearrangement of the molecular or ionic structure of a substance.

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Combustion reaction

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A reaction that involves oxygen and a fuel and which produces carbon dioxide, water and both light and heat energy.

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Covalent bonds

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A bond formed when two or more non-metals share electrons.