If an atom contains 3 protons, 4 neutrons, and 3 electrons, its atomic mass is...
1 point
1
Question 3
3.
A covalent bond is formed as a result of...
1 point
1
Question 4
4.
When sugar is dissolved in water, water is the...
1 point
1
Question 5
5.
In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen atom is...
1 point
1
Question 6
6.
Which of the following identifies the number and location of protons in a lithium atom?
1 point
1
Question 7
7.
Examine the image below. What type of bond is forming between the calcium and chlorine atoms?
1 point
1
Question 8
8.
The attraction between polar molecules is called a(n)...
1 point
1
Question 9
9.
Sulfuric acid is a very strong acid; it would have a pH of...
1 point
1
Question 10
10.
If an atom contains 11 protons and 12 neutrons, its atomic number is...
3 points
3
Question 11
11.
In the space below, draw a sodium atom with all its subatomic particles.
6 points
6
Question 12
12.
Match each description with its correct property of water.
Draggable item
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Corresponding Item
Describes water's resistance to changes in temperature.
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Cohesion
Occurs when water molecules are attracted to one another to form a droplet.
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Adhesion
Describes water's ability to dissolve many solutes.
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Capillary Action
Occurs when water can climb up thin tubes against the force of gravity.
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High Heat Capacity
Occurs when water molecules are attracted to other substances.
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Universal Solvent
Allows insects to "walk on water."
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Surface Tension
1 point
1
Question 13
13.
What defines if an atom is stable?
1 point
1
Question 14
14.
When a sample of sodium chloride (NaCl) dissolves in water, it separates into sodium (Na) ions and chloride (Cl) ions. Which of the following best accounts for the positive charge of the sodium ions?
1 point
1
Question 15
15.
Which of the following correctly describes the subatomic particles?
1 point
1
Question 16
16.
Sulfur has 16 electrons. Which of the following is the arrangement of electrons for sulfur?
2 points
2
Question 17
17.
In the space below, draw a second water molecule. Using a dashed line, draw a hydrogen bond. Lastly, label a covalent bond.
4 points
4
Question 18
18.
Match each definition with the correct term.
Draggable item
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Corresponding Item
A pure substance that contains one type of atom.
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Atom
A substance formed by the chemical combination of 2 or more elements in definite proportions.
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Suspension
A mixture of water and undissolved materials.
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Compound
The building block of all matter.
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Element
4 points
4
Question 19
19.
Organic chemistry studies carbon-based molecules. Due to its atomic structure, carbon atoms form the base of many large, complex molecules. In the space below, draw a carbon atom. Then, exaplain why carbon can form many bonds with other atoms to create large molecules.