Lab Safety
What kind of behavior is prohibited in the lab?
Horse Play, Yelling , Throwing things, Consuming chemicals ... etc.
What does a periodic table contain?
Elements
What is a lewis dot structure?
It shows the valance electrons of an element
Folding a piece of paper is an example of a what type of change?
Physical Change
Usually the _____ are on the left and the _____ are on the right side of a chemical equation.
reactants , products
If a glass test tube breaks what is the next thing you need to do?
Telling the teacher what happened, do not attempt to clean the mess yourself
How do you know how much an Element weighs?
You look at the mass number usually found at the bottom of the element
What kind of bonding did we learn about with Lewis dot Structures?
Ionic bonding
Seeing bubbles and temperature change is a clue that the reaction is a _________ change
Chemical Change
What are the big numbers called in a chemical reaction?
Coefficients
Yes or No and EXPLAIN
No , not safe you don't know what type of chemical you are consuming it could be fatal in some cases
How do I calculate an elements Neutrons
You use the APEMAN method which says that you subtract the mass of an Element from the Atomic Number
How many valence electrons does "Xe" have?
8
Which one of these reactions is a reversable reaction?
A. Chemical
B. Physical
B. Physical
What are the small numbers called in a chemical equation?
Subscripts
What is the proper technique called when testing the smell of an unknown substance? Demonstrate it .
Wafting, waving your hand over the substance and guiding those air particles towards your nose
Where can I find the number of valence electrons on the periodic table? Be specific and give an example.
At the top of a few columns you have numbers, #1 is right above Hydrogen, Lithium, and Sodium, which means that those elements have just one valance electron.
What type of model is known as the "boring" model that shows every single electron that an element has?
Bohr Model
What is the difference between a chemical property and a chemical change?
Chemical property is flammability and chemical change is actually burning something
When balancing a chemical equation what is the main goal? Please explain in your own words
To balance the number or atoms of each element
When working in a lab what is the proper attire, please describe a full outfit that is acceptable.
Closed toed shoes, full length pants or skirt, short sleeves, hair tied back, no dangling jewelry or items.
Who first came up with the periodic table?
Demitri Medeleev
Draw the Lewis Dot structure for CCl4
Carbon should have 4 valence electrons and Chlorine should have 7 valence elecrons.
Give 3 examples of a physical change and 3 examples of a chemical change.
Physical - Food coloring in water, blowing up a balloon, tearing a paper....
Chemical - Vinegar and baking soda, burning a candle, Bleaching your hair....
Is this chemical equation balanced? Explain
2NaClO3 -> 2NaCl + 3 O2
Yes it is balanced we have 2 Na on each side, 2 Cl on each side , 6 O on each side.