Elements, Compounds & Periodic Table

Front

Which of the following represents an element? H₂O, NaCl, H₂, CaCO₃

Back

H₂

Front

Which of the following represents a compound? He, CO₂, Cl, O₂

Back

CO₂

Front

Salt has a chemical formula of NaCl. Salt is a...

Back

Compound

Front

What cannot be broken down into other substances?

Back

Element

Front

How many atoms are there in TOTAL in: Na₂CO₃?

Back

6

Front

How many different elements are represented in the compound Na₂CO₃?

Back

3

Front

True or false: Water is a pure substance.

Back

true

Front

An element is made up of only one kind of _____ (isotope, atom, plastic, metal).

Back

atom

Front

_____ are small particles that make up most types of matter on Earth.

Back

atoms

Front

What is H₂SO₄ made up of?

Back

2 hydrogen, 1 sulfur, 4 oxygen