1. Which particle is described by an orbital in an atom?
A.
Electron
B.
Proton
C.
Neutron
D.
Nucleus
Correct Answer:
Electron
2. An orbital is a region in space where the probability of finding an electron is:
A.
Significant
B.
Always zero
C.
Equal to the number of protons
D.
Determined only by the mass number
Correct Answer:
Significant
3. Which statement is consistent with the concept of an orbital?
A.
The exact position of an electron is represented by a fixed path
B.
The likely location of an electron is represented by a region of space
C.
An electron always remains at one point
D.
An orbital contains only neutrons
Correct Answer:
The likely location of an electron is represented by a region of space
4. An orbital is not a physical track but a region describing the:
A.
Probability of finding an electron
B.
Number of protons
C.
Mass of an atom
D.
Charge of a neutron
Correct Answer:
Probability of finding an electron
5. Which option gives the simplest correct definition of an orbital?
A.
A region around the nucleus where an electron is likely to be found
B.
A circular path around the nucleus
C.
A collection of protons and neutrons
D.
The central core of an atom
Correct Answer:
A region around the nucleus where an electron is likely to be found
6. What is an atomic orbital?
A.
A circular path followed by an electron
B.
A region around the nucleus where the probability of finding an electron is high
C.
The nucleus of an atom
D.
The total number of electrons in an atom
Correct Answer:
A region around the nucleus where the probability of finding an electron is high
7. An orbital describes the likely location of which particle?
A.
Proton
B.
Neutron
C.
Electron
D.
Nucleus
Correct Answer:
Electron
8. Which statement correctly describes an orbital?
A.
It is a fixed circular path of an electron
B.
It is a three-dimensional region of space around the nucleus
C.
It is the central part of an atom
D.
It is a group of protons
Correct Answer:
It is a three-dimensional region of space around the nucleus
9. The concept of an orbital is based on the probability of finding an:
A.
Electron
B.
Alpha particle
C.
Proton
D.
Neutron
Correct Answer:
Electron
10. An orbital is best described as a region where the probability of finding an electron is:
A.
Zero everywhere
B.
Highest
C.
Exactly one hundred percent everywhere
D.
Unrelated to the nucleus
Correct Answer:
Highest
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