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no energy is gained or lost during a chemical reaction.
usually metal atoms that lose electrons and become positive ions.
water droplets that combine with one another, grow too heavy to stay in the air, and fall to the...
the Celsius temperature at which the volume of the gas is zero.
a group of metallic elements that have two electrons in their outer shells and react easily with...
the substance that undergoes reduction and causes the other substance to undergo oxidation.