Composition of Matter Practice

Everything is made of _.

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Chemical changes in matter are essential to all of life's

• follies.

• processes.

• needs.

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All living things contain these 4 elements:

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The H represents the __ for hydrogen.

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The 1 represents the __ for hydrogen.

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NGSS.HS-PS1-1

The 1.008 represents the __ for hydrogen.

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The atomic number represents the number of _ in the nucleus of an atom.

The orbital is a 3D region around a nucleus where _ are found.

• electrons

• protons

• neutrons

The outermost layer of electrons

• atomic

• ionic

• valence

• covalent

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When an orbital is __ from the nucleus, it has more energy.

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