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The period number refers to the number of electron shells or primary energy levels an atom of each element has. Ex: Period 3 elements—Na, Mg, Al, Si, P, S, Cl, and Ar—have three primary electron energy levels.
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Explanation:
sorry if wrong pa brainliest nalang :D
Answer:
A molecule is a group of two or more atoms that form the smallest recognizable unit into which the structure and chemical properties of that substance can be divided and preserved by a pure substance.
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Answer:
6782 has 4, 26.2 has 3, 0.3491 has 4 and 55 has 2 significant figures .
Melting point is dependent on the intermolecular forces which means the bonds between the molecules of bromine as it is a simple molecular structure the intermolecular bonds of bromine are weak bcz they are weak vandervaal forces thats why Bromines melting point is low..In short when intermolecular bomds are weak the M.P is lower