CHEMISTRY UNIT REVIEW                                                              

 Solutions

               

1.        State the atomic theory (5-2). The atom is the smallest particle of matter that still will have the propperties of that matter.

 

2.        An atom is composed of (5-2)

Particle	Charge	Where found	Mass
electron	negative	shells outside nucleus	very small essentially 0
proton	positive	nucleus	1 AMU
neutron	none	nucleus	1AMU

 

1. Fill in the following chart using your periodic table for uncharged atoms

 

ELEMENT	ATOMIC NUMBER	ATOMIC MASS	NUMBER OF PROTONS	NUMBER OF NEUTRONS	NUMBER OF ELECTRONS
Strontium	38	88	38	50	38
Bromine	35	80	35	45	35
Hydrogen isotope	1	3	1	2	1

 

2. Draw  Bohr model of :

1. phosphorus                                                                                    2. potassium

  phosphorous: nucleus has 15 p and 16n electron arrangement is 2, 8, 5

potassium: nucleus has 19 p and 20n electron arrangement is 2, 8, 8, 1

 

3. Atoms in a column share what physical characteristic?

  same chemical properties, same number of valence electrons

4. Put a check in any box that applies to each example.(5-8)

Example	not a molecule	a molecule	an element	a compound
CO2		******		******
Cl2		******	******
Cu	*****		******

  

5. For the following compound, how many different kinds of atoms are there?

How many total atoms are there?

H₂SO₄                                           

# OF KINDS OF ATOMS ___3________

 # OF ATOMS____7________

 Matching. Write the letter of the term that best fits each phrase.

 

1.        G_ A substance with only one kind of atom in its molecules                                        A. ATOMIC NUMBER

2.        _D__A substance composed of different kinds of molecules                                            B. ION

3.        I__A group of atoms bonded together                                                                        C. COVALENT BOND

4.        _EA pure substance with more than one kind of atom in its molecules                        D. MIXTURE

5.        B _An atom with an electric charge                                                                             E. COMPOUND

6.        _JAn atom with a different number of neutrons than the usual atom                              F. ATOMIC MASS

7.       __AThe number of protons in an atom                                                                           G. ELEMENT

8.        __F_The number of neutrons plus protons in an atom                                                      H. IONIC BOND

9.        __C_A connection between atoms involving a sharing of electrons                                   I. MOLECULE

10.     _H_ a connection between atom involving an attraction between oppositely                  J. ISOTOPE          charged atoms

 

WRITE AN EMPIRICAL FORMULA FOR WATER _________H2O_____________________

 

Write a structural formula for water ________________________________________

For each substance, write the letters of each description that applies

 

monosaccharide_ABCEILOQ_______________	A. CONTAINS CARBON
Lipid       ABCEFGJN______	B. CONTAINS HYDROGEN
Protein   ____ABCDFH	C. CONTAINS OXYGEN
Disaccharide __ABCEIKQ__	D. CONTAINS NITROGEN
Polysaccharide _ABCEFIMPQ	E. PROVIDES ENERGY FOR A CELL
	F. IS USED AS STRUCTURAL MATERIAL OF A CELL
	G. CONTAINS GLYCEROL
	H. IS a polymer OF AMINO ACIDS
	I. is composed of basic structure as follows:
	J. contains fatty acids
	k. has formula C12H22O11
	l. has formula C6H12O6
	m. A polymer of sugars
	n. includes oils and waxes
	o. includes glucose
	p. includes cellulose
	q. Is a carbohydrate