Lewis Structures Ionic

How would you draw a Lewis dot diagram for Magnesium?

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Tags

NGSS.HS-PS1-1

What type of compound is barium hydroxide, Ba(OH)₂?

• diatomic

• acidic

• covalent

• ionic

Which of the following offers the strongest explanation for why the melting temperatures of most ionic compounds are far greater than the melting temperatures of most covalent compounds?

• Ionic bonds are much stronger than the molecular attractions between covalently bonded compounds. 

• Covalent bonds are not as strong as ionic bonds. 

• As a solid, ionic compounds have a very organized crystalline structure which takes a lot of energy to break apart.

• Most covalent compounds have at least one weak bond in their structure that is easily broken when heat is added.

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.

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

• A) Na with one dot and Cl with seven dots around it

• B) Na with no dots and Cl with eight dots around it

• C) Na with two dots and Cl with six dots around it

• D) Na with three dots and Cl with five dots around it

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the primary reason ionic compounds like NaCl form crystal lattice structures?

• A) To maximize the distance between ions

• B) To minimize the energy of the system

• C) To increase the volume of the compound

• D) To allow for electrical conductivity

Tags

NGSS.HS-PS1-4

NGSS.HS-PS2-4

In the Lewis structure of magnesium oxide (MgO), how many electrons are transferred from magnesium to oxygen?

• A) 1

• B) 2

• C) 3

• D) 4

Tags

NGSS.HS-PS1-2

Which of the following best describes the electron configuration change when forming the ionic compound calcium fluoride (CaF2)?

• A) Calcium loses two electrons, each fluorine gains one electron

• B) Calcium gains two electrons, each fluorine loses one electron

• C) Calcium loses one electron, each fluorine gains two electrons

• D) Calcium gains one electron, each fluorine loses two electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the charge on the cation in the ionic compound aluminum oxide (Al2O3)?

• A) +1

• B) +2

• C) +3

• D) +4

Which of the following ionic compounds would have the highest melting point based on their Lewis structures?

• A) NaCl

• B) MgO

• C) KBr

• D) LiF

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3