Font size
WorksheetsQuiz - Elements and Compounds
Total questions: 10
Worksheet time: 17mins
What is the atomic mass for carbon? Round answer 2 decimal places.
(a)
What is the atomic mass for Br2? Round answer 2 decimal places.
(a)
Which element located in Period 5 Group 16
(a)
Which element located in Period 4 Group 2
(a)
What Group is Aluminum located in?
1
8
13
18
In the chemical reaction shown below, what is the beginning mass of mercuric oxide?
2HgO(? grams)→2Hg(200 grams)+O2(16 grams)
16 grams
200 grams
216 grams
184 grams
A 25.3-g sample of an unknown compound contains 0.8 g of oxygen. What is the percent by mass of oxygen in the compound?
1.5%
6%
3%
30%
Which of the following is a compound?
neon
mud
crude oil
water
What is the percent by mass of carbon in carbon dioxide (CO2)? Round Answer 2 decimal places.
(a)
What is the percent by mass of oxygen in carbon dioxide (CO2)? Round Answer 2 decimal places.
(a)
Consider the table. In a sample of 100.0 grams of sucrose, what would be the expected mass of hydrogen?
51.26 grams
42.20 grams
100.00 grams
6.50 grams
A pure substance that cannot be separated into simpler substances by physical or chemical means is a(n)
Element
Compounds
Mixture
Molecule
The periodic table organizes the elements into a grid or horizontal rows called (a) and vertical columns called (b)
Which is a pure substance made up of two or more different elements that are combined chemically?
Alloy
Compound
Suspension
Solution
