Formulas and Elements

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms
• 2 oxygen atoms
• 3 oxygen atoms
• 4 oxygen atoms

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
• 4

Tags

NGSS.MS-PS1-1

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

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

• Molecule
• Compound
• Coeffiecient
• Subscript

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

Which of the following is NOT an element?

• H₂O
• H₂
• O₂
• Au

Tags

NGSS.MS-PS1-1

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-1