Week 2 Chemistry Quiz
Questions and Answers
- 1.
Define 'matter' in your own words
- 2.
For the following scenario, write the safety or classroom rule violation(s) that occured: Diana and Mike were going to be late to their next class. After rushing to put away a few materials, they left the rest of the materials on the lab table.
- 3.
For the following scenario, write the safety or classroom rule violation(s) that occurred: The teacher was not in the room yet. Jake began weighing chemicals, touching them with his hands. His nose itched so he rubbed it.
- 4.
How many protons are in Cobalt?
- 5.
How many neutrons are in silver?
- 6.
How many electrons are in iron?
- 7.
You need to keep the temperature of a hot water bath at 21.6oC. Would it be better to use a thermometer with a line for every 0.5oC or every 0.1oC? Please explain your answer in complete sentences.
- 8.
You use a ruler to measure an object that is 23.4 cm. A. What is the highest value the actual length could be? B. A. What is the lowest value the actual length could be?
- 9.
What is the charge of a proton?
- A.
Negative
- B.
Neutral
- C.
Positive
- D.
None of the above
Correct Answer
C. PositiveExplanation
A proton is a subatomic particle that carries a positive charge. It is one of the fundamental particles that make up an atom, along with neutrons and electrons. Protons are located in the nucleus of an atom and are essential for determining the atomic number and identity of an element. They have a charge of +1, which is equal in magnitude but opposite in sign to the charge of an electron. Therefore, the correct answer is positive.Rate this question:
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- 10.
What is the charge of a neutron?
- A.
Negative
- B.
Neutral
- C.
Positive
- D.
None of the above
Correct Answer
B. NeutralExplanation
A neutron is a subatomic particle that is found in the nucleus of an atom. It does not have any electrical charge, meaning it is neutral. Unlike protons, which have a positive charge, and electrons, which have a negative charge, neutrons have no charge at all. This neutrality allows neutrons to interact with both positively charged protons and negatively charged electrons, contributing to the stability of an atom.Rate this question:
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- 11.
What is the charge of an electron?
- A.
Negative
- B.
Neutral
- C.
Positive
- D.
None of the above
Correct Answer
A. NegativeExplanation
An electron is a subatomic particle that carries a negative charge. It is one of the fundamental particles that make up atoms. Electrons are found outside the nucleus of an atom and are involved in various chemical reactions and electrical currents. The negative charge of an electron is equal in magnitude to the positive charge of a proton, which is the other subatomic particle found in the nucleus of an atom. Therefore, the correct answer is negative.Rate this question:
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- 12.
The atomic number tells you how many _____________________ are in an element
Correct Answer
protons
electrons
protons and electronsExplanation
The atomic number of an element corresponds to the number of protons in its nucleus. Since the number of protons and electrons in a neutral atom are equal, the atomic number also tells us the number of electrons in the element. Therefore, the correct answer is protons, electrons, and protons and electrons.Rate this question:
- 13.
Which value, 12.0cm or 12.00 cm would be closer to the actual length of the object?
- A.
12.0
- B.
12.00
- C.
Option 3
- D.
Option 4
Correct Answer
A. 12.0Explanation
The value 12.0cm would be closer to the actual length of the object. The additional decimal place in 12.00cm does not provide any significant increase in accuracy since the object's length is given to the nearest tenth of a centimeter. Therefore, the extra zero after the decimal point in 12.00cm is irrelevant in this context.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Aug 29, 2014Quiz Created by
Alissa Hoeft
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