How many valence electrons does a bromine atom have?

• 1
• 2
• 6
• 7

Tags

NGSS.HS-PS1-1

If my charge becomes 2+ what does that say about me?

• I am stealing 2 electrons
• I am losing 2 electrons
• I am in period 2
• I have an atomic # of 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If I gain electrons I become

• Positive because I've added to my atom
• negative because I've added electrons
• same because i'm balanced
• equal because now I have electrons

Tags

NGSS.HS-PS1-1

Metals tend to 

• gain electrons
• lose electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct formula for the compound, lithium oxide?

• LiO
• Li₂O
• LiO₂
• Li₂O₂

Tags

NGSS.HS-PS1-2

What do Roman Numerals represent in the name of a transition metal compound?

• how many atoms of the metal there are

• the oxidation number of the nonmetal

• the charge of the metal ion

• the mass number

Where are the Roman Numerals located in a transition metal compound?

• after the anion
• before the cation
• between the cation and anion
• they are not used for transition metals

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

Tags

NGSS.HS-PS1-2

PbS₂

• lead sulfide
• lead sulfur
• lead II sulfide
• lead IV sulfide

Tags

NGSS.HS-PS1-2

The proper formula for magnesium hydroxide:

• MgOH
• Mg₂OH
• Mg(OH)₂
• Mg₂OH₂