Which electron-dot structure represents a non-polar molecule?

• A
• B
• C
• D

• A
• B
• C
• D

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as

• a nonmetal 
• an ionic compound
• a molecular compound 
• a metal

Tags

NGSS.HS-PS1-3

What is the correct chemical formula for Calcium Bromide?

• CaBr
• Ca2Br
• CaBr2
• Ca2Br2

Tags

NGSS.MS-PS1-1

Given the structure representing a molecule, it can be said that the molecule is...

• 1)  symmetrical and nonpolar
• 1)  symmetrical and polar
• 1)  asymmetrical and nonpolar
• 1)  asymmetrical and polar

At STP, solid carbon can exist as diamond and graphite.  Compared to the molecular structure and chemical properties of diamond, graphite has

• 1)  A different molecular structure and different properties
• 1)  A different molecular structure and the same properties
• 1)  The same molecular structure and different properties
• 1)  The same molecular structure and the same properties

1.  In a nonpolar covalent bond, electrons are

• 1)  Located in a mobile “sea” shared by many atoms
• 1)  Shared unequally by two atoms
• 1)  Shared equally by two atoms
• Transferred from one atom to another

1.  The chemical bonding in sodium phosphate, Na₃PO₄, is classified as 

• metallic only
• Both covalent and metallic
• Both covalent and ionic
• Ionic only

What is the total number of pairs of electrons shared in the molecule O_{2 (DRAW IT TO HELP YOU ANSWER)}

• 1
• 2
• 3
• 4

1.  Which formula represents a molecular compound?

• LiOH
• NaI
• Kr
• N₂O₄

Tags

NGSS.HS-PS1-1