Elements and compounds

Which statement best describes an element?

• pure, made of more than one type of atom

• when combined, a chemical reaction forms

• pure, made of only one type of atom

• can be broken down easily

The smallest particle of matter that makes up an element and a compound?

• Element

• Chemical

• Atom

• Substance

Which one has more than one type of atom in it?

• Element
• Compound 

What is an example of an element?

• Oxygen
• Pure water
• Air
• Table salt

Are there any compounds on the periodic table 

• yes there are many 
• no because only elements are on the periodic table
• I think they are?

A pure substance that cannot be broken down into simpler substance by a chemical reaction.

• compound

• element

• solid

• liquid

Two or more atoms chemically combined

• compound

• molecule

• element

• solid

Tags

NGSS.MS-PS1-1

What elements made up the compound Carbon dioxide?

• Carbon and Oxide

• Carbon and Oxygen

• Carbon and Hydrogen

• Carbon and Carbon

Methane is a colorless odorless gas compound. Given the structure, what elements compose the methane?

• Helium and Carbon

• Helium and Calcium

• Hydrogen and Carbon

• Hydrogen and Calcium

Which of the following statements describes a compound?

• It contains only one kind of atom.

• It can be separated by physical means.

• It cannot be decomposed into simpler types of substances.

• It consists of atoms of two or more different elements bond together.