Ionic Lewis Structures

What is the correct Lewis Dot Structure for Barium?

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Tags

NGSS.MS-PS1-1

A model of a compound is shown. Which of the following identifies the compound and explains why? 

• Network covalent solid because there are covalent bonds between the atoms.

• Ionic solid because there are positive and negative charges attracted to each other.

• Molecular compounds because metals and nonmetals are sharing electrons.

• Metallic solid because electrons are distributed among the positive nuclei.

Tags

NGSS.MS-PS1-1

• ionic

• covalent

• metallic

• acid

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these could be the lewis dot diagram for an oxygen anion?

• A

• B

• C

• D

Answer explanation

Oxygen has 6 valence electrons, but it wants 8. Therefore, it will steal 2 electrons so that it has a total of 8 electrons. Choice A has 8 electrons.

Metals tend to

• gain electrons

• lose electrons

Tags

NGSS.MS-PS1-1

Which of the following is the correct Lewis structure for the ionic compound sodium chloride (NaCl)?

• A) Na with one dot, Cl with seven dots

• B) Na with no dots, Cl with eight dots

• C) Na with eight dots, Cl with no dots

• D) Na with two dots, Cl with six dots

What is the charge on the cation in the ionic compound magnesium oxide (MgO)?

• A) +1

• B) +2

• C) -1

• D) -2

In the Lewis structure of calcium fluoride (CaF2), how many electrons does each fluoride ion have?

• A) 6

• B) 7

• C) 8

• D) 9

Which of the following best describes the electron transfer in the formation of the ionic compound lithium bromide (LiBr)?

• A) Lithium gains one electron, bromine loses one electron

• B) Lithium loses one electron, bromine gains one electron

• C) Lithium gains two electrons, bromine loses two electrons

• D) Lithium loses two electrons, bromine gains two electrons

What is the correct Lewis structure for the ionic compound potassium iodide (KI)?

• A) K with one dot, I with seven dots

• B) K with no dots, I with eight dots

• C) K with eight dots, I with no dots

• D) K with two dots, I with six dots