Atoms, Elements and Compounds

The one or two letters used to represent elements 

• Yield sign
• Coefficient
• Chemical Symbol
• Subscript

Element or compound?
H₂O

• element
• compound

Tags

NGSS.MS-PS1-1

Element or compound?
O₂

• Element
• Compound

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 24

Tags

NGSS.MS-PS1-1

A physical change is?

• It changes the object into something different
• Objects or substances undergo a change that does not change their chemical composition
• it is just like a chemical reaction
• Paper burning

The smallest physical unit of an element or compound (O₂ and H₂O are both examples of ONE of these)

• Physical change
• Chemical Symbol
• Yield Sign
• Molecule

Tags

NGSS.MS-PS1-1

A chemical change is?

• a shoe lace cut in half
• doesn't change anything
• changes the look of an object
• change that results in the formation of new chemical substances

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The arrow symbol used in a chemical equation

• Yield sign
• Subscript
• Coefficient
• Chemical formula

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

Tags

NGSS.MS-PS1-1

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

• Compound
• Molecule
• Coefficient
• Subscript