Compounds & Elements
Physical vs. Chemical
Chemical & Lab Safety
Atomic Models
The Periodic Table
100
What is the difference between an element and a compound?
An element is just one element whereas a compound is more than one to make up one thing.
100
List 3 physical properties.
What is colour, ductility, malleability, boiling point, melting point, luster, hardness, etc.
100
What does WHMIS Stand for?
What is Workplace Hazardous Materials Information System?
100
How do you find the number of neutrons in a substance?
atomic mass - atomic number
100
What is the difference between a group and a period?
a group runs left to right and a period runs up and down.
200
What would you describe iced tea as?
What is a solution?
200
Identify a physical property of water.
Boiling point = 100 C
Melting point = 0 C
200
Why do you always add acid to water?
What is acid reacts strongly with water and can create a harmful reaction.
200
What is the difference between and electron and a valence electron?
A valence electron occurs in the outermost shell of the atom.
200
What element is period 3 group 17?
What is Chlorine?
300
What is the difference between a homogenous and heterogenous mixture?
Homogenous is a mixture where you cannot tell what is all in the mixture and heterogenous is a mixture where you can see all of its components.
300
What are three signs of a chemical change?
What is:
1. bubbles/gas
2. Change in colour
3. Change in smell
4. Change in temperature
5. Solid forms
300
Describe 3 labs rules to follow.
1. Tie hair back.
2. No food or water.
3. Wear eye protection.
4. Read through the lab before starting.
5. No running.
300
What is an isotope? List one thing that makes an isotope different.
What is different versions of an element with a different atomic mass and number of neutrons but has the same number of protons.
300
Why are the group 18 elements special?
They have a full outer shell of valence electrons so they don't like to bond with other elements.
400
How many oxygen atoms are in the following:
2(SO4)?
What is 8 oxygen atoms?
400
Provide an example of a physical change.
Water evaporating, ice melting, etc.
400
What does MSDS stand for?
What is material safety data sheet?
400
Draw the Bohr Model of Potassium.
400
What is a diatomic element? Tell me one of them on the periodic table.
An element that naturally occurs as a pair (oxygen, fluorine, iodine, hydrogen, nitrogen, bromine & chlorine)
500
Tell me how many of each atom are in the following:
3(H2SO4)
H = 6
S = 3
O = 12
500
Is fire burning a log a physical or chemical change? Why?
Chemical change, the log is burned and the substance changes to ash. There is a new substance formed which is the ash.
500
What does this image mean?
What is Danger corrosive?
500
What can a period and a group number tell us about our Bohr model?
Period: number of electrons shells
Group: number of valence electrons
500
What is a chemical property of group 1 elements?
They are very reactive.