Unit 1-Lesson 1-The atomic structure

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7 Terms

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Matter

Anything that has mass and volume

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The atom

The building and structural unit of matter

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Fertilizers

Chemical compounds used to improve agricultural production

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Structure of the atom

Consists of a tiny, central nucleus, containing positive protons and neutral neutrons, having a mass of 1u each. Very small particles called “electrons” which are negatively charged revolve around the nucleus, having a mass of 1/1836u

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Mass number (A)

The number of protons and neutrons combined

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Atomic number (Z)

The number of protons

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A-Z=________

Number of neutrons