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WorksheetsBasic chemistry #2
Total questions: 18
Worksheet time: 13mins
The image shows the periodic grid for SODIUM. What is Sodium's atomic number?
11
12
23
Impossible to tell
The image shows the periodic grid for SODIUM. What is Sodium's atomic mass?
11
12
23
Impossible to tell
What element will have the most similar physical and chemical properties to the element Sulfur (S)?
(click on the periodic table to expand it!)
Carbon (C)
Phosphorous (P)
Oxygen (O)
Neon (Ne
What element will have the most similar physical and chemical properties to the element Bromine (Br)?
(click on the periodic table to expand it!)
Fluorine (F)
Carbon (C)
Krypton (Kr)
Selenium (Se)
An example of a synthetic substance is:
Plastic
Petroleum
Silicones
The image shows the periodic grid for SODIUM. How many protons are found in a potassium atom?
11
12
23
Impossible to tell
The image shows the periodic grid for SODIUM. How many electrons are found in a potassium atom?
11
12
23
Impossible to tell
The image shows the periodic grid for SODIUM. How many neutrons are found in a potassium atom?
11
12
23
Impossible to tell
Is the calcium molecule (in blue) oxidized or reduced in the following reaction?
2 CaO--> 2 Ca + O2
Oxidized
Reduced
In the reaction Zn + H2O --> ZnO2 + H2
which element is oxidized?
Zn
H2O
None
An oxidizing agent is always reduced.
True
False
Under certain conditions and in some chemical reactions, water can act as both an acid and a base.
True
False
What minerals make water hard?
Magnesium
Calcium
Sodium
Magnesium and calcium
Sodium and calcium
Check all the answers that are true for soft water.
Soft water leaves residue on clothes and silverware
Soft water produces a healthy lather with soap
Soft water is clear
Soft water sometimes has a slightly salty taste when you drink it
Soft water is worse for the skin and hair than hard water
Which of the following elements are considered macro elements in the human body? (check all the answers that apply)
Carbon
Nitrogen
Magnesium
Iron
Potassium
A substance that changes the rate of a chemical reaction without being used up in the reaction is called a ________________.
bond
catalyst
acid
ion
