Elements, Compounds, Atoms, and Molecules

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

Select two words that describe this diagram

• molecule

• element

• atom

• compound

Tags

NGSS.MS-PS1-1

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.

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

• methane is an element and carbon and hydrogen are compounds.
• carbon, hydrogen, and methane are all elements.
• carbon, hydrogen, and methane are all compounds.
• carbon and hydrogen are elements and methane is a compound.

Tags

NGSS.MS-PS1-1

Atoms combine to form _______. 

• electrons
• molecules
• nuclei
• neutrons

Tags

NGSS.MS-PS1-1

A compound is...

• a substance made up of one type of atom in its molecular form.
• a substance formed by the reaction of two or more elements.
• a mixture formed by the mixing of two or more elements.
• a substance made up of one type of atom in its atomic form.

Tags

NGSS.MS-PS1-1