How does a magnesium atom form a bond with an oxygen atom?

by giving one pair of electrons to the oxygen atom.

by sharing one pair of electrons, both electrons provided by the magnesium atom.

by sharing two pairs of electrons, both pairs provided by the oxygen atom.

by sharing two pairs of electrons, each atom donating one pair of electrons.

number of electrons in highest energy shelf

Ionic Bonding Quiz Grade 8A

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1/13 Questions

Ionic bonds always form between metals and ___________.
- Nonmetals
- Metals
- Metalloids

About This Quiz

The 'Ionic bonding Quiz grade 8A' assesses understanding of ionic compounds, focusing on their formation and properties. It covers key concepts such as ion types, electron transfer, and examples of ionic bonds, crucial for students in grade 8A studying chemistry.

2.

Negatively charged ions, called ____________, result from gain of electrons.
- Cations
- Anions
Correct Answer

A. Anions

Explanation

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.

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3.

Positively charged ions, called ____________, result from loss of electrons.
- Cations
- Anions
Correct Answer

A. Cations

Explanation

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.

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1
4.

When an electron is added to or removed from an atom, the atom becomes a(n) ________.
- Ion
- Bond
- Nothing; it stays an atom
Correct Answer

A. Ion

Explanation

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.

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1
5.

How does a magnesium atom form a bond with an oxygen atom?
- By giving one pair of electrons to the oxygen atom.
- By sharing one pair of electrons, both electrons provided by the magnesium atom.
- By sharing two pairs of electrons, both pairs provided by the oxygen atom.
- 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.

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6.

Lewis dot shows?
- The total number of electrons
- Total number of protons
- Total number of neutrons
- Number of electrons in highest energy shelf
Correct Answer

A. Number of electrons in highest energy shelf

Explanation

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.

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7.

Select the formula for strontium chloride.
- SrCl2
- SrCl
- Sr2Cl3
- SrClO2
- SrClO3
Correct Answer

A. SrCl2

Explanation

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.

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1
8.

Select the formula for aluminum sulfide.
- Al2(SO4)3
- AlS
- Al2S3
- Al3(SO3)2
- AlSO3
Correct Answer

A. Al2S3

Explanation

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.

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2
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?
- X2Y
- XY2
- XY
- XY3
Correct Answer

A. X2Y

Explanation

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.

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2
10.

Which element, when combined with fluorine, would most likely form an ionic compound?
- Phosphorus
- Lithium
- Carbon
- Chlorine
Correct Answer

A. Lithium

Explanation

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.

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1
11.

Aluminum is a group 3 metal. Which ion does Al typically form?
- Al3-
- Al5+
- Al3+
- Al5-
Correct Answer

A. 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+.

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12.

NaCl is an example of the chemical formula of
- An ion
- A covalent compound
- An ionic compound
- A crystal
Correct Answer

A. An ionic compound

Explanation

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.

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2
13.

Which pair of elements will combine to form an ionic compound?
- Carbon and chlorine
- Fluorine and sodium
- Sulphur and oxygen
- Oxygen and carbon
Correct Answer

A. Fluorine and sodium

Explanation

An ionic compound is formed between a metal and a non-metal.

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Mar 21, 2023

Quiz Edited by
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Feb 10, 2015

Quiz Created by
Mohammad Sayaheen

Ionic Bonding Quiz Grade 8a

Ionic bonds always form between metals and ___________.

Quiz Preview

Negatively charged ions, called ____________, result from gain of electrons.

Positively charged ions, called ____________, result from loss of electrons.

When an electron is added to or removed from an atom, the atom becomes a(n) ________.

How does a magnesium atom form a bond with an oxygen atom?

Lewis dot shows?

Select the formula for strontium chloride.

Select the formula for aluminum sulfide.

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?

Which element, when combined with fluorine, would most likely form an ionic compound?

Aluminum is a group 3 metal. Which ion does Al typically form?

NaCl is an example of the chemical formula of

Which pair of elements will combine to form an ionic compound?