Molecules and Compounds (Version#2)

All atoms have similar properties if they're

• the same kind of atom/element.

• joined in a compound.

• a mixture.

Which diagram below shows an element?

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Tags

NGSS.MS-PS1-1

Which diagram below shows a compound molecule?

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Tags

NGSS.MS-PS1-1

Which diagram below shows a mixture?

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Describe a CO₂ molecule.

• 2 carbons and 1 oxygen = 3 total atoms in the molecule

• 1 carbon and 2 oxygens = 2 molecules

• 1 carbon and 2 oxygen = 3 total atoms in the molecule

Tags

NGSS.MS-PS1-1

CO is a

• mixture

• elemental molecule

• compound molecule

Tags

NGSS.MS-PS1-1

Choose the BEST answer below for the following question. Why is H₂O a compound molecule?

• H₂O has two atoms chemically combined/bonded.

• H₂O has two different elements chemically combined/bonded.

• H₂O has two different elements.

Tags

NGSS.MS-PS1-1

Check each statement that is true about a molecule. (Hint 3 correct answers)

• The smallest particle of a substance that has all of the physical and chemical properties of that substance.

• Molecules are made up of atoms that are held together by chemical bonds.

• Molecules are made up of one or more atoms.

• a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

Tags

NGSS.MS-PS1-1

Choose the statements that are true about the organization of the Periodic Table of Elements. (Hint 2 correct answers)

• It's arranged based on the grouping of the elements according to chemical properties.

• It's arranged based on the grouping of elements according to physical properties.

• It's arranged in order of increasing atomic number (number of protons in the nucleus).