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Concept Check
Naming & Writing Ionic Compounds
Naming & Writing Molecular Compounds
Chemical Reactions
Writing & Balancing Chemical Equations
100
What is a chemical reaction?
A change in matter that produces new substances with new properties.
100
Name the following compound: LiF. Why is it an ionic compound?
Lithium Fluoride It is an ionic compound because the first part of the name is a metal ion whereas the second part of the name is a non-metal ion.
100

Name the following compound: CO. Why is it a covalent compound?

Carbon monoxide. It is a covalent compound because both parts of the name are non-metals.

100
What are two ways to tell that a chemical reaction has occurred?
1) change in energy 2) change in colour (products is different colour from reactants) 3) gas is formed (bubbles, odour) 4) precipitate is formed (solid subtance when two clear solutions are mixed)
100
Name the diatomic elements. (Hint: "diatomic 7")
1) hydrogen 2) nitrogen 3) oxygen 4) fluorine 5) chlorine 6) bromine 7) iodine
200
What is the term used for substances that react together in a chemical reaction?
Reactants
200
Write the chemical formula for calcium chloride.
CaCl(2)
200

Quick learning check: What is the difference between an ionic compound and a covalent compound?

Ionic compounds= first part of the name is a metal ion whereas the second part of the name is a non-metal. Covalent compounds= both parts of the name are non-metals.

200
Predict whether a chemical reaction has occurred for the following process: Frying chicken. If yes, state the evidence.
Yes. Evidence: odour
200
Write the following word equation as a chemical formula: sodium chloride ----> sodium + chlorine
NaCl ----> Na + Cl(2)
300
Identify the information listed for the element beryllium: a) symbol b) atomic number c) number of protons d) number of electrons
a) Be b) 4 c) 4 d) 4
300

Write the chemical formula of aluminum oxide.

Al(2)O(3)

300

Write the chemical formula of sulfur dioxide

SO2

300

What's the difference between a chemical and a physical change?

Chemical changes involve rearranging of chemical bonds and are irreversible

Physical changes don't make or break chemical bonds and are reversible.

300
Balance the following equation: ___ K + ___ Br(2) ----> ___ KBr
2 K + Br(2) ----> 2 KBr
400

What happens to electrons in ionic bonding?

They are donated or accepted (given or taken)

400
Name the following compound: NaBr
Sodium bromide
400

Write the chemical formula for Carbon dioxide

CO2

400

The law of conservation of mass states that...

For chemical reactions this means...

matter is neither created nor destroyed, so in a chemical reaction all atoms of the reactants must be present in the products

400
Balance the following chemical equation: ___ S + ___ O(2) ----> ___ SO(3)
2 S + 3O(2) ----> 2 SO(3)
500
Identify the elements that make up the compound NaCl. How many atoms of each element are there?
Elements: Sodium (Na) and Chlorine (Cl). There is one atom of each.
500
Write the chemical formula of potassium sulfide.
K(2)S
500

Name the following compound: NO. Is this a covalent compound?

Nitrogen monoxide. Yes it is a covalent compound because both nitrogen (N) and oxygen (O) are non-metals.

500

Is breaking bonds an endothermic or exothermic process

endothermic

(requires energy put in)

500
Balance the following chemical equation: ___ As + ___ O(2) ----> ___ As(2)O(5) What type of reaction is this?
4 As + 5 O(2) ----> 2 As(2)O(5) This is a synthesis reaction.