Ionic Bonding Quiz Grade 8a

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.

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.

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.

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.

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+.

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.

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.

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

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.

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.

Magnesium will transfer two electrons from itself to an oxygen atom. So that Mg and O both achieve noble gas configuration of 2, 8.

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.

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.