Chemical Reactions

How many carbon atoms (C) are in a CO₂ molecule?

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-1

How many Nitrogen atoms (N) are in a molecule of Cu(NO₃)₂ ?

• 1

• 2

• 3

• 4

The small number to the right of an elemental symbol ( H₂) is called?

• a subscript

• a coefficient

• a variable

• a divisor

The smallest building block of an element is the......................

• compound

• molecule

• atom

• fluid

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

Na + MgF₂ -->  NaF + Mg
What are the reactants?

• Na + MgF₂
• Na
• NaF + Mg
• NaF

Tags

NGSS.MS-PS1-2

NH₃ ---> N₂ + H₂
What are the products?

• N₂ + H₂
• N₂
• H₂
• NH₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If there is no subscript, there is ______ atom(s) of that element.

• 0
• 2
• only 1
• 1 million

Tags

NGSS.MS-PS1-1

What is the correct name for MgI₂?

• Manganese IV iodide

• Manganese diiodide

• Magnesium iodide

• Magnesium diiodide

What type of charge do metals have when they lose electrons?

• positive

• negative