HISTORY OF ATOM AND ATOMIC THEORIES

Anything that occupy space and has mass.

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A subatomic particle with neither positive or negative charge

The smallest unit of an element

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A positively charged particle.

A negatively charged particle.

A tabular array of the chemical elements organized by atomic number.

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The number of protons also the number of electrons in a neutral atom.

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A horizontal row of elements in a periodic table.

The vertical column of elements in the periodic table arranged in order of increasing atomic number.

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It describes the way electron moves or the shape of probability distribution which is defined by the orbital shapes.