Basic Concepts of Atoms and Compounds

What are the basic structural components of a typical atom?

• Electrons, protons, and neutrons

• Molecules, compounds, and elements

• Cells, tissues, and organs

• Atoms, ions, and isotopes

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What comprises the nucleus of an atom?

• Electrons and protons

• Protons and neutrons

• Neutrons and electrons

• Atoms and molecules

What is a compound?

• A single atom

• A mixture of gases

• Two or more atoms of different elements combined

• A type of molecule with only one element

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NGSS.MS-PS1-1

What are chemical bonds formed with?

• Protons

• Neutrons

• Electrons

• Atoms

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What is used to represent compounds?

• Chemical symbols

• Chemical formulas

• Chemical reactions

• Chemical equations

What does the subscript in a chemical formula indicate?

• The type of chemical reaction

• The number of molecules

• The number of atoms in each element

• The temperature of the reaction

Why is matter considered conserved in chemical processes?

• Atoms are destroyed

• Atoms are created

• Atoms are conserved

• Atoms change into energy

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Which elements are found in living things?

• Oxygen, carbon, hydrogen, nitrogen

• Oxygen, silicon, aluminum, iron

• Carbon, hydrogen, sodium, potassium

• Nitrogen, calcium, magnesium, sulfur

Smallest piece of an element is a(n)

• molecule

• atom

How many protons are in Sodium (Na)?

• 22.99

• 19

• 11

• 3

Tags

NGSS.MS-PS1-1