SOL 6.4e Chemical Equations & Counting Atoms

The one or two letters used to represent elements on the Periodic Table of Elements.

• Yield sign

• Coefficient

• Chemical Symbol

• Subscript

A way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.

• Molecule

• Chemical formula

• Physical change

• Coefficient

The small number that is written below the symbol and shows how many atoms of each element is present.

• Compound

• Molecule

• Coefficient

• Subscript

The large number written in front of a chemical formula. It shows the number of molecules.

• Molecule

• Compound

• Coeffiecient

• Subscript

How many Hydrogen atoms are in H₂O?

• zero
• one
• two
• three

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

How many total atoms are in K₂CO₃?

• 6
• 1
• 4
• 8

Tags

NGSS.MS-PS1-1

How many atoms of phosphorous (P) are in Ba₃(PO₄)₂

• 2
• 3
• 8
• 6

Tags

NGSS.MS-PS1-1

The small numbers written below the symbol to the right and tells you how many atoms there are.

• chemical symbol

• chemical formula

• subscript

• coefficient