A change in matter that produces new substances with new properties.
100
Name the following compound: LiF. What type of compound is it?
Lithium Fluoride
It is an ionic compound because the first part of the name is a metal ion and the second part of the name is a non-metal ion.
100
What are the subatomic particles?
electrons, protons, and neutrons
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)
What is the term used for substances that react together in a chemical reaction?
Reactants
200
Quick learning check: What is the difference between an ionic compound and a molecular compound?
Ionic compounds= first part of the name is a metal ion whereas the second part of the name is a non-metal.
Molecular compounds= both parts of the name are non-metals.
200
What is the relative electrical charge of an electron
Negative One
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 balanced chemical reaction:
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
How many neutrons are in chlorine-35
18 neutrons
300
What type of reaction is this?
copper + silver nitrate ----> silver + copper nitrate
Single displacement reaction
300
Balance the following equation:
___ K + ___ Br(2) ----> ___ KBr
2 K + Br(2) ----> 2 KBr
400
What are three of the traditional areas of study in chemistry?
Three of the following: organic chemistry, inorganic chemistry, biochemistry, analytical chemistry, and physical chemistry
400
Name the following compound: NO. What type of compound is this
Nitrogen monoxide
It is a molecular compound
400
Which element has a higher electronegativity- boron or fluorine?
Fluorine
400
What type of chemical reaction is this?
Water ----> hydrogen + oxygen
Decomposition reaction
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
Describe the periodic trend for for ionization energy?
As you go down a group ionization energy decreases, and as you move from left to right across a period ionization energy
500
What type of reaction is Na + Cl ----> NaCl ?
A combination reaction.
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.