Pretest - Atoms - Ions - Isotopes
An atom never gains or loses a proton just the number of electrons is affected during chemical reaction and when it does the atom becomes an ion and has both negative and positive charge. Test out what you know about these three by taking the quick test below. All the best!
- 1.
Atoms and Ions are all the same?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Atoms have NO charge and Ions HAVE a charge.Rate this question:
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- 2.
What is the difference between atoms and ions when it comes to the number of neutrons?
- A.
Ions have one extra neutron
- B.
Ions have one less neutron
- C.
There is no difference when it comes to the number of neutrons
Correct Answer
C. There is no difference when it comes to the number of neutronsExplanation
Neutrons have nothing to do with whether an atom becomes an ion. It is the electrons that decide.Rate this question:
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- 3.
In an atom, the numbers of protons and electrons are...
- A.
Equal
- B.
Not equal
Correct Answer
A. EqualExplanation
Neutral atoms have the same number of protons and electrons. Atoms that are not neutral are called ions.Rate this question:
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- 4.
In an ion the number of electrons are...
- A.
... the same as the number of protons
- B.
... not the same as the number of protons
- C.
...the same as the number of neutrons
- D.
... not the same as the number of neutrons
Correct Answer
B. ... not the same as the number of protonsExplanation
Definition of an ion - an atom that has lost or gained electronsRate this question:
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- 5.
An ion is an atom that has..
- A.
Gained or lost protons
- B.
Gained or lost neutrons
- C.
Gained or lost electrons
Correct Answer
C. Gained or lost electronsExplanation
That is the definition. Remember it.Rate this question:
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- 6.
An atom that has gained electrons is a
- A.
Cation (positive ion)
- B.
Anion (negative ion)
- C.
Neutral ion
Correct Answer
B. Anion (negative ion)Explanation
Electrons have a negative charge. So gaining electrons would make you negative. Negative ions are called anions.Rate this question:
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- 7.
Atoms can obtain full other shell by...
- A.
Getting rid of a proton
- B.
Loosing a neutron
- C.
Loosing or gaining electrons
Correct Answer
C. Loosing or gaining electronsExplanation
Atoms can obtain a full outer shell by either losing or gaining electrons. When an atom loses electrons, it becomes positively charged because it now has more protons than electrons. This process is known as ionization. On the other hand, when an atom gains electrons, it becomes negatively charged because it now has more electrons than protons. This process is called electron gain or reduction. By either losing or gaining electrons, atoms can achieve a stable electron configuration and obtain a full outer shell, which makes them more stable and less reactive.Rate this question:
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- 8.
Why do atoms gain or lose electrons?
- A.
To become happy
- B.
I don't know
- C.
To become a jedi
- D.
To explode
Correct Answer
A. To become happyExplanation
octet rule. Atoms want 8 electrons in their outer energy level. Most do not, so they lose or gain electrons to get 8.Rate this question:
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- 9.
An atom that has lost electrons is called a/an....
Correct Answer
cation, CationExplanation
Cations are atoms that have lost electrons. This loss of electrons makes the atom have more protons than electrons, creating a positive charged atom called a cation.Rate this question:
- 10.
What makes isotopes different from each other?
- A.
Atomic number
- B.
Number of neutrons
- C.
Number of electrons
- D.
Number of protons
Correct Answer
B. Number of neutronsExplanation
Isotopes are the same element, so their atomic number has to be the same. The only difference in isotopes are the number of neutrons.Rate this question:
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Current Version
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Feb 20, 2023Quiz Edited by
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Oct 16, 2015Quiz Created by
Kyle Pearson
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