Elements and Compounds

What is the periodic table of elements?

• A chart that organizes all known elements based on many properties.

• A list of all known compounds.

• A table of chemical reactions.

• A diagram of atomic structures.

What does the chemical symbol "O" represent?

• Oxygen

• Osmium

• Ozone

• Oxide

What is the smallest unit of an element?

• Molecule

• Atom

• Compound

• Mixture

Which of the following is a chemical symbol?

• H2O

• O

• NaCl

• CO2

What is the purpose of chemical symbols?

• To represent elements on the periodic table

• To describe chemical reactions

• To measure atomic mass

• To calculate molecular weight

Which element is represented by the symbol "H"?

• Helium

• Hydrogen

• Hafnium

• Holmium

What is the smallest unit of matter?

• Molecule

• Atom

• Compound

• Mixture

Tags

NGSS.MS-PS1-5

What is an element?

• A mixture of different substances

• A pure substance consisting of only one type of atom

• A compound of two or more elements

• A type of molecule

What elements make up water (H2O)?

• Sodium and chlorine

• Hydrogen and oxygen

• Hydrogen and chlorine

• Sodium and oxygen

Tags

NGSS.MS-PS1-1

Can a molecule be made of the same element?

• Yes

• No

• Only if it's a gas

• Only if it's a metal

Tags

NGSS.MS-PS1-1