atoms and formula

what is Na2Cl

• two sodium and three chlorine

• two sodium and one chlorine

• two sodium and two chlorine

• two sodium

_________ is formed by two types of atoms .

• compounds

• elements

• mixtures

• atoms

an element is ?

what is a mixture?

name the first three elements in the periodic table.

What does the subscript in a chemical formula tell you?

• How many molecules are present

• How many atoms are present

• How many elements are present

• How many neutrons are present

What elements are represented in this chemical formula?  $Fe_2O_3$  

• Iron, Oxygen

• Francium, Europium, Oxygen

• Ferrium, Oxygen

• Berylium, Oxygen

What is the total number of atoms in this formula? $H_2O_2$  

• 2

• 4

• 3

This is any combination of two or more atoms from different elements that are chemically combined.

• compound

• molecule

• element

• pure substance

This is a list of the 117 known elements that exist (and a picture of it is on this quiz!).

• The Periodic Table of Elements

• The Student Faculty Handbook

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• Wikipedia