8.P.1.1 Elementary

The basic building blocks of most of the matter around you.

• elements

• protons

• atoms

• electrons

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Because an element can not be broken down into a simpler substance, it is considered to be

• a chemical impurity

• a chemical substance

• a pure substance

• unbreakable

An example of a pure substance is

• gold

• salad

• sweet tea

• electron clouds

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The center of an atom is called the

• proton

• electron

• neutron

• nucleus

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protons are

• located in the nucleus and have a positive charge

• located in the nucleus and have a negative charge

• the most important part of an atom

• atoms

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electrons are

• located in the nucleus and have a positive charge

• located in the nucleus and have a negative charge

• located in the electron cloud and have a negative charge

• located in the electron cloud and have a positive charge

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In an element

• there are many different substances

• the atoms are all the same

• the atoms are all different

• the electrons, protons and neutrons are located in the nucleus

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Identify the heterogeneous mixture

• sweet tea

• salad

• jello

• gold

Identify the homogeneous mixture

• milk

• trail mix

• calcium

• sugar

Which of the following is not a compound

• aluminum (Al)

• salt (NaCl)

• water (H₂O)

• sugar (C₆H₁₂O₆)

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NGSS.MS-PS1-1