Chemical formulas and elements vs. compounds
Chemical change and conservation of mass
A mix between all categories
Tell me about the groups on the periodic table
Where on the periodic table is...?
100
Is this an element or compound? O
Element. It has the one element, oxygen
100
If you're heating up a kettle of water, is this a chemical change?
No. This is a physical temperature change. The water is being heated, not causing the heat itself.
100
Acetic acid has a chemical formula of CH4O2 How many of each element are there?
Carbon - 1 Hydrogen - 4 Oxygen - 2
100
At room temperature, most elements are... Choose the right answer and also explain one wrong answer. a - metalloids b - metals c - solids d - gases
solids. wrong answers are a, b, d
100
Draw a periodic table and label where these are located Gases at room temperature
Top right corner near the and including the group Noble gases, the most rightmost group and hydrogen in the top left corner.
200
Is this an element or compound? NO
Compound. There are two different elements, nitrogen and oxygen
200
In the copper lab, nitric acid was poured on the copper powder in the fume hood. What happened to the copper atoms? Choose the right answer and also choose one wrong answer and explain why it's wrong. a) escaped as part of the brown gas. b) destroyed by the strong acid c) in the blue liquid as copper ions in a compound d) in the blue liquid as copper atoms.
c - in the blue liquid as copper ions in copper (II) nitrate, Cu(NO3)2, a compound.
200
What is the correct way to represent a solid of sodium chloride? Choose the right answer and explain why one wrong answer is wrong. A. NaCl (g) b. NaCl(s) c. NaCl(l) d. NaCl (aq)
NaCl (s) the (s) stands for solid.
200
Which elements would you expect to have the most similarity? Elements in the same group (vertical column) or the same period (horizontal row) ?
Same group! For example, carbon and oxygen are in the same period but have very different properties from each other. E.g., oxygen is a gas at room temperature and flammable, carbon is a solid and makes up diamonds and graphite.
200
Draw a periodic table and label where these are located Metals
Generally, to the left of the metalloids "staircase"
300
Is this an element or compound? Cl <----lowercase L
Element because there is one element, chlorine
300
Does the law of conservation of mass apply to the copper cycle lab? Explain.
Yes the law of conservation of mass applies to copper cycle lab because the copper never left the container, it was only changed from different forms of copper, from different compounds before changing back to element form at the end.
300
Acetic acid has a chemical formula of CH4O2. Why is acetic acid a compound and not an element?
because it consists of several elements, carbon, hydrogen and oxygen
300
Where are the alkali metals located on the periodic table? Draw a picture or describe in words
Left most group
300
At room temperature, most elements in the periodic table are...
solids
400
For multiple choice questions, you will be asked to explain a wrong answer as well as choosing a right answer. What is the correct way to represent a solution of sodium chloride (hint: salt water)? Choose the right answer and choose one wrong answer and explain why it's wrong. a) NaCl (aq) b) NaCl (s) c) NaCl (l) d) NaCl (g)
a) NaCl (aq) Your wrong answer will depend.
400
What is the law of conservation of mass?
Mass cannot be created or destroyed
400
Put these elements in order of MOST reactive to LEAST reactive. Cs, Ar, Os, Na
Cs > Na > Os > Ar
400
What is the correct order of the groups from LEFT to RIGHT on the periodic table? Noble gases halogens alkali metals alkaline earth metals
From left to right alkali metals alkaline earth metals halogens Noble gases
400
Draw the periodic table and label where you find... noble gases
last group on the right
500
Explain the difference between an element and a compound
an element has on element present while a compound has two or more different elements present.
500
What are two signs of chemical change or chemical reaction?
here are five possible signs and an example 1 - temperature change (handwarmer packets) 2 - color change (cooked egg whites) 3 - gas or bubbles in liquid produced (baking soda and vinegar) 4 - smell produced or changes (rotting fruit) 5 - precipitate forms (solid forms in solution)
500
What pairs of elements would you expect to have the most similar properties? Choose the correct answer and choose one wrong answer and explain why it was wrong. A) arsenic, As, and silicon, Si B) hydrogen, H, and helium, He C) nitrogen, N, and oxygen, O D) fluorine, F, and chlorine, Cl
D) flouring and chlorine are in the same group. all the other pairs are in the same periods or both different periods and columns.
500
In the alkali metal group (left most column), draw an arrow towards the direction of where the MOST reactive elements are located.
Arrow pointing straight down.
500
Draw a periodic table and label where you find metalloids
A staircase along the right side of the periodic table
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