Full Lesson - Form Analysis & Parts of EQ

Formula Analysis and Parts of a Chemical Equation

By Shelly Barrell

Multiple Choice

Our last unit was about chemical bonds. What is the KEY to understanding how chemical bonds work?

• All living things need chemical bonds

• Chemical bonds are made when valence electrons are moved to make complete outer shells

• There are 3 types of chemical bonds.

• Metalloidial bonds are the strongest type of bond that allow any type of element to join with the others using protons

Multiple Choice

Chemical bonds occur because all atoms are trying to have ___ valence electrons.

• 2

• 4

• 8

• 10

Multiple Choice

Do living things need elements to be chemically bonded in ionic, covalent, and metallic bonds?

• Yes!

• No

Multiple Choice

What happens to chemical bonds during a chemical reaction in living things?

• they are smashed

• they are destroyed

• they are broken and remade

• they steal electrons

Multiple Choice

Which is the best definition of a chemical formula?

• a group of elements

• a ratio of elements bonded together

• chemicals making something

• we didn't learn this

Multiple Choice

The organization of a chemical formula is determined by.....

• the element

• the structure

• the composition

• the valence electrons

Multiple Choice

Which answer correctly shows how to write the chemical formula for water?

• $$H_2O$$  

• H2O 

• 2HO

• OH₂

Multiple Choice

A group of elements chemically bonded together is called a_________.

• molecule

• covalent bond

• coefficient

• chemical formula

Multiple Choice

Coefficients come ______ the chemical formula.

• before

• in the middle of

• after

​What do the molecules and the chemcial formulas look like together?

Match

In the following chemical formula for caffeine, what do each of the numbers and letters represent?

30 C₆H₁₀N₄O₂

• 30

• C

• 10

• Number of Nitrogen atoms in 1 molecule

Coefficient

Carbon

Number of Hydrogen atoms in 1 molecule

4

• Coefficient

• Carbon

• Number of Hydrogen atoms in 1 molecule

• 4

Multiple Choice

You need to _________ coefficients with the number of each element in the chemical formula.

• add

• subtract

• multiply

• divide

Multiple Choice

What do parentheses do in a chemical formula?

• show how many atoms there are

• show the structure of the molecule

Multiple Choice

The coefficient is multiplied with the ______ (the little numbers) to find the total number of atoms present.

Example: 3 MgF₂ ==> Mg = 3 atoms and F = 6 atoms

• coefficient
• exponent
• subscript
• denominator

Math Response

How many potassiums are in the following chemical formula?

3 K₂ (PO₂)₄

Type answer here

Correct Answer: 6

Deg^°

Rad

Math Response

How many phosphorus atoms are in the following chemical formula?

3 K₂ (PO₂)₄

Type answer here

Correct Answer: 12

Deg^°

Rad

Multiple Choice

What is the correct count for each element in this formula?

2C₆H₈O₃

• C = 6

  H = 8

  O = 3

• C = 8

  H = 10

  O = 5

• C = 12

  H = 16

  O = 6

Poll

How am I feeling about counting the number of atoms in a chemical formula?

• Awesome - I totally get this

• Okay - I need some more practice

• Totally Lost

Multiple Choice

Which is the best definition of a chemical reaction?

• a process by which chemical bonds are broken and reformed

• a process to make or destroy matter

• a process to make things explode

Multiple Choice

Do all chemical reactions make explosions, fire, sound, and light?

• No - most are actually slow and "boring" but allow living things to exist

• Yes - that is what makes science cool

Multiple Choice

What is a chemical equation?

• A mathematical relationship

• A simple way to show what is happening in a reaction

• A complicated way to do combine math and science

Multiple Choice

What do you call what you start with in a chemical reaction?

• reactant

• yield

• product

Draw

Circle where the reactants are.

Multiple Choice

What is the end result of a chemical reaction called?

• reactant

• yield

• product

• producer

Draw

Circle where the products are in the chemical equation.

Poll

How am I feeling about the parts of a chemical equation?

• Awesome - I got this!

• Okay - need some more practice

• Totally Lost