CA Review

Which answer has the subatomic particles labeled correctly?

• red - Protons, blue -Neutrons, black -Electrons

• red - Neutrons, blue - Electrons, black - Protons

• red - Electrons, blue - Protons, black - Neutrons

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NGSS.MS-PS1-1

Which atom is being shown?

• Hydrogen

• Helium

• Lithium

• Oxygen

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How do you know which atom is being shown?

• count the electrons

• count the protons

• count the neutrons

• count everything in the nucleus

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NGSS.MS-PS1-1

Pure substances are composed of only one type of atom are —

• elements and can be represented by one chemical symbol.

• alloys and can be represented by one chemical symbol.

• mixtures and can be represented by two or more chemical symbols.

• compounds and can be represented by two or more chemical symbols.

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NGSS.MS-PS1-1

The acronym "CHNOPS" is often used to help students remember the most abundant elements in living organisms. Using the periodic table, which elements are represented in CHNOPS?

• Carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur

• Carbon, helium, nitrogen, oxygen, phosphorus, and sulfur

• Chromium, hydrogen, oxygen, phosphorus, and selenium

• Calcium, hydrogen, nitrogen, oxygen, potassium, and sulfur

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NGSS.MS-PS1-1

Which of the following is NOT a compound?

• FeO

• CO

• H₂O₂

• Fe

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The list below shows four different substances. Which of the substances listed contains only one type of atom?

• I and II only

• I, III, and IV only

• III and IV only

• II only

Tags

NGSS.MS-PS1-1

This molecule is:

• an atom composed of oxygen and carbon elements

• an element composed of oxygen and carbon atoms

• a compound composed of oxygen and carbon atoms

• a mixture composed of oxygen and carbon compounds

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NGSS.MS-PS1-1

How many elements are there in magnesium chloride, MgCl₂?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

Which of the following statements is true?

• Methane is an element because its most basic unit is composed of atoms.

• Methane is a mixture because its most basic unit is composed of different atoms.

• Methane is a compound because its most basic unit is composed of more than one atom.

• Methane is a compound because it's 2 different elements are chemically bonded together.

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NGSS.MS-PS1-1