Ionic Bonding Quiz Grade 8a
Ion formation, valence and ionic bonding review.
Questions and Answers
- 1.
Ionic bonds always form between metals and ___________.
- A.
Nonmetals
- B.
Metals
- C.
Metalloids
Correct Answer
A. NonmetalsExplanation
Ionic bonds occur when there is a transfer of electrons from a metal atom to a nonmetal atom. Nonmetals have a higher electronegativity, meaning they have a stronger attraction for electrons compared to metals. This makes nonmetals more likely to gain electrons and form negative ions. Metals, on the other hand, have a lower electronegativity and are more likely to lose electrons and form positive ions. Therefore, ionic bonds always form between metals and nonmetals.Rate this question:
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- 2.
Negatively charged ions, called ____________, result from gain of electrons.
- A.
Cations
- B.
Anions
Correct Answer
B. AnionsExplanation
Negatively charged ions, called anions, result from the gain of electrons. Anions are formed when an atom or molecule gains one or more electrons, resulting in an excess of negative charge. This gain of electrons increases the overall negative charge of the ion, making it negatively charged. Cations, on the other hand, are positively charged ions that result from the loss of electrons. Therefore, in this context, the correct answer is anions.Rate this question:
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- 3.
Positively charged ions, called ____________, result from loss of electrons.
- A.
Cations
- B.
Anions
Correct Answer
A. CationsExplanation
Positively charged ions, called cations, are formed when an atom loses one or more electrons. This loss of electrons creates an imbalance between the positive protons in the nucleus and the negative electrons, resulting in a net positive charge. Therefore, cations are the correct answer since they are positively charged ions that are formed by the loss of electrons.Rate this question:
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- 4.
When an electron is added to or removed from an atom, the atom becomes a(n) ________.
- A.
Ion
- B.
Bond
- C.
Nothing; it stays an atom
Correct Answer
A. IonExplanation
When an electron is added to or removed from an atom, the atom becomes an ion. An ion is an atom that has gained or lost one or more electrons, resulting in a net positive or negative charge. This process is known as ionization.Rate this question:
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- 5.
How does a magnesium atom form a bond with an oxygen atom?
- A.
By giving one pair of electrons to the oxygen atom.
- B.
By sharing one pair of electrons, both electrons provided by the magnesium atom.
- C.
By sharing two pairs of electrons, both pairs provided by the oxygen atom.
- D.
By sharing two pairs of electrons, each atom donating one pair of electrons.
Correct Answer
A. By giving one pair of electrons to the oxygen atom.Explanation
Magnesium will transfer two electrons from itself to an oxygen atom. So that Mg and O both achieve noble gas configuration of 2, 8.Rate this question:
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- 6.
Lewis dot shows?
- A.
The total number of electrons
- B.
Total number of protons
- C.
Total number of neutrons
- D.
Number of electrons in highest energy shelf
Correct Answer
D. Number of electrons in highest energy shelfExplanation
The Lewis dot structure is a way to represent the valence electrons of an atom or molecule. It shows the number of electrons in the highest energy level or shell, which is also known as the valence shell. This is important because the valence electrons are the ones involved in chemical bonding and determining the reactivity of an atom. Therefore, knowing the number of electrons in the highest energy shelf helps us understand the chemical behavior and properties of an element.Rate this question:
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- 7.
Select the formula for strontium chloride.
- A.
SrCl2
- B.
SrCl
- C.
Sr2Cl3
- D.
SrClO2
- E.
SrClO3
Correct Answer
A. SrCl2Explanation
The correct formula for strontium chloride is SrCl2. This is because strontium is a group 2 element with a +2 charge, while chloride is a group 17 element with a -1 charge. To balance the charges, two chloride ions are needed for every strontium ion, resulting in the formula SrCl2.Rate this question:
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- 8.
Select the formula for aluminum sulfide.
- A.
Al2(SO4)3
- B.
AlS
- C.
Al2S3
- D.
Al3(SO3)2
- E.
AlSO3
Correct Answer
C. Al2S3Explanation
The correct formula for aluminum sulfide is Al2S3. This is because aluminum is a trivalent cation with a charge of +3, and sulfur is a divalent anion with a charge of -2. To balance the charges, two aluminum ions combine with three sulfur ions, resulting in the formula Al2S3.Rate this question:
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- 9.
Element X has an electronic structure 2, 8, 8, 1. Element Y has an electronic structure of 2, 8, 6. What is the chemical formula of the compound formed between X and Y?
- A.
X2Y
- B.
XY2
- C.
XY
- D.
XY3
Correct Answer
A. X2YExplanation
Element X can give away 1 electron each. Y needs to gain 2 electrons. Hence, Y needs 2 of element X. Hence, the formula is X2Y.Rate this question:
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- 10.
Which element, when combined with fluorine, would most likely form an ionic compound?
- A.
Phosphorus
- B.
Lithium
- C.
Carbon
- D.
Chlorine
Correct Answer
B. LithiumExplanation
Lithium would most likely form an ionic compound when combined with fluorine because lithium is a metal and fluorine is a nonmetal. Metals tend to lose electrons and form positive ions, while nonmetals tend to gain electrons and form negative ions. In the case of lithium and fluorine, lithium would lose one electron to become a positive ion (Li+), and fluorine would gain one electron to become a negative ion (F-). The attraction between these oppositely charged ions would result in the formation of an ionic compound.Rate this question:
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- 11.
Aluminum is a group 3 metal. Which ion does Al typically form?
- A.
Al3-
- B.
Al5+
- C.
Al3+
- D.
Al5-
Correct Answer
C. Al3+Explanation
Aluminum typically forms the Al3+ ion. This is because aluminum belongs to group 3 in the periodic table, which means it has three valence electrons. In order to achieve a stable electron configuration, aluminum loses all three of its valence electrons, resulting in a 3+ charge. Therefore, the correct ion formed by aluminum is Al3+.Rate this question:
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- 12.
NaCl is an example of the chemical formula of
- A.
An ion
- B.
A covalent compound
- C.
An ionic compound
- D.
A crystal
Correct Answer
C. An ionic compoundExplanation
NaCl is an example of an ionic compound because it is formed by the transfer of electrons between sodium (Na) and chlorine (Cl) atoms. In this compound, sodium loses one electron to become a positively charged ion (Na+), while chlorine gains one electron to become a negatively charged ion (Cl-). The opposite charges of the ions attract each other and form a stable crystal lattice structure, resulting in the formation of NaCl.Rate this question:
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- 13.
Which pair of elements will combine to form an ionic compound?
- A.
Carbon and chlorine
- B.
Fluorine and sodium
- C.
Sulphur and oxygen
- D.
Oxygen and carbon
Correct Answer
B. Fluorine and sodiumExplanation
An ionic compound is formed between a metal and a non-metal.Rate this question:
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Mar 21, 2023Quiz Edited by
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Feb 10, 2015Quiz Created by
Mohammad Sayaheen
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