Chem Misc Review

What particle view below is a mixture?

• 
• 
• 
• 

What is an example of a physical property?

• Silver is shiny

• Alcohols are flammable

• Alkali metals are reactive with water

• Acids are sometimes corrosive

Is this image showing a homogeneous or a heterogeneous mixture? Image: Cesar salad

• homogeneous

• heterogeneous

Does this image represent a chemical or a physical change?

• Chemical change

• Physical change

When an atom gains a valence electron, it becomes a(n) _____________ ion.

• positive

• negative

• neutral

Where are the nonmetals located on the periodic table? 

• Blue
• Red
• Green

charge of lithium ion

• -2
• -1
• +1
• +2

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

What charge does an electron have?

• Negative
• Positive
• Neutral
• Contrated

An ionic bond forms when

• valence electrons are shared back and forth (move between) two atoms.

• a sea of mobile electrons surround the cations and they then become negativly charged

• valence electrons are transferred from one atom to another, forming charged ions that are then pulled together by attraction between opposite charges

• none of the above