Bonding and Lewis Dot Structures

Which type of bond is formed between two nonmetals?

• Ionic

• Covalent

• Metallic

Tags

NGSS.HS-PS1-1

Which type of bond is formed by the transfer of electrons?

• Ionic

• Covalent

• Metallic

Covalent bonds are formed by sharing an electron between a nonmetal to a ​ (a)   .

• metal
• metalloid
• nonmetal

Ionic bonds are formed by transferring an electron from a ​​ (a)   to a ​ nonmetal.

• metal
• metalloid
• nonmetal

Is this the correct Lewis Dot Structure for phosphorus?

• Yes

• No

Tags

NGSS.HS-PS1-1

What is the "Octet Rule"?

• All atoms want a full valence shell.

• All atoms want to have 2 valence electrons.

• All atoms want to have 8 valence electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct Lewis Dot Structure for ammonia NH3

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is the correct molecular structure for carbon dioxide?

• 
• 
• 
• 

What do the dots in a Lewis dot structure represent?

• Molecules.

• Protons.

• Valence electrons.

• Atoms.

Answer explanation

Valence electrons are the electrons in the valence shell of an atom. The valence shell of an atom is made up of the atomic orbitals in the highest principal energy level of the atom.

When we draw the Lewis dot structure for an atom, we first write down the element symbol for the atom. Then, we draw dots around the element symbol. The number of dots we draw is equal to the number of valence electrons in the atom.

How many electrons should Sulfur have around its Lewis dot model?

• 5
• 6
• 7
• 8

Tags

NGSS.HS-PS1-1