NGSS.MS-PS1-1

(8.5A) Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom shown above?

• It has mass but no charge.
• It has no mass and a positive charge.
• It has a large mass and a negative charge.
• It has no mass and an equal number of positive and negative charges.

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NGSS.MS-PS1-1

Which statement describes the model that shows a compound.

• Model X shows a compound because there are two different types of atoms

• Model X shows a compound because two different atoms are chemically bonded together.

• Model Y dhows a compound because there is more than one type of atom.

• Model Y shows a compound because each pair of matching atoms can form a chemical bond.

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NGSS.MS-PS1-1

Mg

• Compound

• Element

• Mixture

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NGSS.MS-PS1-1

A molecule is a group of atoms that are held together by chemical bonds.

• True

• False

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NGSS.MS-PS1-1

Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table. Which student’s responses are correct?

• student 1

• student 2

• student 3

• student 4

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NGSS.MS-PS1-1

How many total atoms make up 4NH₃?

• 4

• 16

• 3

• 12

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NGSS.MS-PS1-1

If a substance is composed of one type of atom that is arranged in one particular way, how is this substance best classified

• element

• compound

• mixture

• gas

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NGSS.MS-PS1-1

How many atoms of Oxygen are in this chemical formula?

• one

• four

• two

• three

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NGSS.MS-PS1-1

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

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NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

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NGSS.MS-PS1-1