Counting Atoms and Elements

What does the subscript in a chemical formula tell you? (a)  

• How many molecules are present
• How many atoms are present
• How many elements are present
• How many neutrons are present

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

6

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

• Iron, Oxygen

• Francium, Europium, Oxygen

• Ferrium, Oxygen

• Berylium, Oxygen

Tags

NGSS.MS-PS1-1

• 2

• 4

• 3

Tags

NGSS.MS-PS1-1

3

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

Which of the following elements is least likely to form a compound?

• Hydrogen

• Sodium

• Argon

• Potassium

Which of the following is a molecule of a compound?

Tags

NGSS.MS-PS1-1

Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?

• niF2

• NIF₂

• Ni₁F₂

• NiF₂

Tags

NGSS.MS-PS1-1

2H₂ + O₂ --------> 2H₂O What  are the reactants?

• ----->
• 2H₂O
• 2H₂ +O₂

Tags

NGSS.MS-PS1-1