Chemistry review

Atomic Structure

100

Draw an atom of Phosphorus.

15P

16N

2,8,5 electrons

200

How many orbitals and valence electrons for an atom of Iodine (I)?

5 orbitals

7 valence electrons

300

Will Magnesium gain or lose electrons in bonding?

What charge will its ion be?

LOSE

2+

400

Draw an atom of Vanadium.

23P

28N

2,8,11,2

500

Draw an ion of Chlorine and include the charge on the symbol.

Cl^-

17P

18N

2,8,8

Periodic Table

100

List 2 metals, 2 metalloids, and 2 nonmetal elements

answers vary

metals: Li, Ca

metalloids: Si, Ge

nonmetals: He, C

200

List 3 elements that exist as diatomic molecules.

answers vary

H,N,O,F,Cl,Br,I

300

What does row number and column number on the periodic table tell you about an element?

row number is the number of orbitals

column number is valence electrons

400

Which element in each pair has the largest atomic radius?  (BIGGEST)

Na, S

Na, Cs

Na

Cs

500

Which elements from each pair would be MOST REACTIVE?

Li, Na                O,F

Na, Mg              F, Cl

Na        F

Na        F

Compounds

100

Write the formula for the following compound:

aluminum chloride

AlCl₃

200

Write the formula of the compound containing the following ions.

Na⁺  with  SO₄^2-  

Na₂SO₄  

300

Write the formula for the compound containing the following ions.

Cu²⁺  and OH^1-

Cu(OH)₂

400

Which type of compound is formed by a metal bonding with a nonmetal element?

What phase would it most likely be in at room temperature?

ionic compound

Solid

500

Which of these compounds exist as molecules?

LiCl               MgCO₃

NO₂              CuCl₂

(NH₄)₂O        PH₃       

 NO₂  and PH₃   

Equations

100

8H₂O

Which number is the subscript?

2

200

Which type of reaction is this?

2K  +  CaCl₂  -->  2KCl  +  Ca

Single Replacement

300

Balance this equation:

C₅H₁₂  +  O₂  -->  CO₂  +  H₂O

C₅H₁₂  +  8O₂  -->  5CO₂  +  6H₂O

400

Predict the products of this single replacement reaction:

Al  +  ZnO  -->  

Al₂O₃  +  Zn

500

Predict the products for this double replacement reaction.  Make sure all compounds are neutral!

LiCl  +  CaO  -->  

Li₂O  +  CaCl₂

Heat & Phases

100

What does temperature measure?

Kinetic Energy

How fast the particles are moving!

200

What metal will heat up the SLOWEST in the sun?

Zinc or Iron

IRON

300

Calculate the heat gained by 25 grams of iron when it is heated from 20^oC to 25^oC.

51.5 J

400

What two variables affect phase?

pressure and temperature

500

Calculate the specific heat (c)of a metal that gains 556 J of heat when 98 grams of it increases 25^oC.  What metal is it from your reference sheet?

.227 J/g^oC  -->  tin