Atom

IMPORTANT

Atom: Overview

This topic covers concepts such as Atoms and Molecules, Atom, Size of Atom, Significance of Atoms, Naming of Elements, Element Names Based on Place of Discovery, IUPAC Name and Symbols of Some Elements, etc.

Important Questions on Atom

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Explain; oxygen as a reference for measuring relative atomic mass.

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Why was oxygen used as a reference element to measure atomic mass initially? Then why was it rejected?

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Oxygen is chosen as a reference for measuring relative atomic mass.

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How the measuring standard for relative atomic mass can be the oxygen ?

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What is the reason behind choosing oxygen as a reference for measuring relative atomic mass?

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Polonium is discovered in Germany.

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What five elements were named after countries?

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Which element is discovered in the Germany and name is given based on the discovery place?

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Name the country where francium is discovered.

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Name the elements name based on the place of discovery.

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Dalton's atomic theory stated that all atoms of a given element have different size, mass and chemical properties.

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The law of multiple proportions, the law of conservation of _____, and the law of constant proportions are not violated by Dalton’s atomic theory.

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What is the Dalton's atomic theory of matter?

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How does Dalton’s atomic theory explain the law of conservation of mass? 

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What is the importance of atom in life?

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What is an atom ?

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Molecules are bonded together to form an atom.

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What are the significance of an atom ?

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_____ is an extremely important structure that make up all of the materials on earth.

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What is e/m ratio?