Bohr Models & Lewis Structures

1. What is an acid? What is a base?

• An acid is a substance that produces hydrogen ions when dissociated in water. A base produces hydroxide ions.

• Acids are hydrogen ion donors, bases are hydrogen ion acceptors.

• Acids accept pairs of electrons and bases donate pairs of electrons.

• All of the above

2. What does an element’s atomic number tell you?

• The number of protons in an atom of that element

• The number of electrons in an atom of that element

• The number of neutrons in an atom of that element

• The identify of that element

3. Where can electrons be found within an atom?

• Inside the nucleus in energy levels

• Outside the nucleus in energy levels

• Inside the protons

• Inside the neutrons

4. How do you determine the number of valence electrons in an atom?

• Draw a Bohr model and count the number of electrons in the outermost energy level

• Look at the group number: for groups 1-2 it is the same, for groups 13-18, subtract 10 from the group number.

• Add the atomic number to the mass number

• Subtract the atomic number from the mass number

Tags

NGSS.HS-PS1-1

Which of the following represents a Lewis Dot Structure for Oxygen?

• 
• 

Lewis Dot structures show -

• Only valence electrons

• Only core electrons

• No electrons

• All electrons and energy levels

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Bohr models show -

• Only valence electrons

• Only core electrons

• No electrons

• All electrons and energy levels