Chemical Formulas

Chemical Formulas

by John Toje

PWMS Chemical Formulas & Compounds Formative

Physical Science Honors

Multiple Choice

The elements in water are hydrogen and _________.

• chlorine

• oxygen

• nitrogen

• potassium

Fill in the Blank

How many total atoms are in the compound, 2Na(OH)₂?

Multiple Select

1. How many total atoms are in this compound?

2. How many atoms of Hydrogen are in C₆H₁₂O₆?

• 12 total atoms

• 24 total atoms

• 12 atoms of Hydrogen

• 24 atoms of Hydrogen

Fill in the Blank

How many total atoms are in 6H₂SO₄? (remember to add your parentheses and distribute).

Valence Electrons

• These are the number of ELECTRONS on the OUTER SHELL and they are responsible for how the atom BONDS to other atoms.

Multiple Choice

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Multiple Choice

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Multiple Choice

How many ELEMENTS are in this chemical equation?

• 3

• 4

• 9

• 10

Multiple Choice

Acetic acid is a compound found in vinegar. The chemical formula for acetic acid is CH₃COOH.

How many different ELEMENTS are in acetic acid?

• 3

• 5

• 6

• 8

Multiple Choice

All ____________ are made up of two or more atoms bonded together.

• atoms

• molecules

• electrons

• elements

Multiple Choice

The smallest unbreakable unit of a compound is called

• subscript
• proton
• formula
• molecule

The REACTANTS are the starting atoms. Basically the reactants mix together and REACT! The PRODUCTS are what you end up with after the chemical reaction occurs. The atoms rearrange to make something new. The something NEW are the PRODUCTS.

Use RAP to memorize which part of the chemical equation are the reactants and which part are the products

Multiple Choice

NaOH + HCl --> NaCl + H₂O Identify the reactants in the chemical equation above.

• NaOH and HCl

• NaCl and H₂O

• HCl and H₂O

• HCl and NaCl

Multiple Choice

2AgNO₃ + CaCl₂ --> 2AgCl + Ca(NO₃)₂

Identify the products in the chemical equation above.

• 2AgNO₃ and CaCl₂

• 2AgCl and Ca(NO₃)₂

• CaCl₂ and Ca

• Ag, Cl, N, and Ca

Multiple Choice

Cu + 2AgNO3 $$\longrightarrow$$ 2Ag + Cu(NO3)2 How many copper (Cu) atoms are there in  Cu(NO3)2 ?

• 1

• 2

• 5

• 6

Multiple Choice

How many MOLECULES are on the PRODUCT side of the chemical equation NaOH + HCl --> NaCl + H₂O

• 1

• 2

• 4

• 5

Poll

THE END

Did you learn anything today????

• Yes, I did and excited about learning more.

• No. I don't care about my grade.

• Yes, kinda. The holiday can't come any sooner!!!!

• Yes. I also like my science teacher and class.