atoms elements, compounds

Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?

• Hydrogen is an element made of two or more kinds of atoms.
• Hydrogen is a compound made of only one kind of atom.
• Hydrogen is a compound made of two or more kinds of atoms.
• Hydrogen is an element made of only one kind of atom.

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The element oxygen, represented by the symbol O, is classified as

• a pure substance
• a compound
• a mixture
• a solution

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What is a compound?

• an atom with more electrons than protons
• a substance in which the atoms of two or more elements are combined together
• an atom with more neutrons than protons
• a substance in which the atoms of three or more elements are combined together

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NGSS.MS-PS1-1

The chemical combination of two or more different kinds of atoms in fixed amounts is called a(n)

• orbit
• compound
• mixture
• element

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What defines a mixture?

• described by a chemical formula
• can be broken down into its basic substances through physical means
• created through a chemical reaction
• cannot be broken down into simpler substances

What is the name of a single type of atom?

• cell
• proton
• element
• atom

What is the term for combining 2 or more DIFFERENT atoms together?

• atoms
• elements
• molecules
• compounds

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What is the picture displayed?

• atom
• element
• molecule
• compound

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What is the picture displayed?

• Mixture

• element

• molecule

• compound

Glucose (C₆H₁₂O₆) contains atoms of carbon, hydrogen, and oxygen that are chemically bonded together.  What type of matter is glucose?

• Glucose is an element
• Glucose is a compound 
• Glucose is a mixture
• Glucose is a metal

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NGSS.MS-PS1-1