Chemistry exam #2

which one is bigger in the pair? 1. Al and B 2. Na and Al 3. S and O 4. O and F 5. Br and Cl 6. Mg and Ca

1. Al 2. Na 3. S 4. O 5. Br 6. Ca

circle the atom in each pair that has the greater ionization energy. 1. Li or Be 2. Ca or Ba 3. Na or K 4. P or Ar 5. Cl or Si 6. Li or K

1. Be 2. Ca 3. Na 4. Ar 5. Cl 6. Li

What ions might be formed from the following atoms? 1. Potassium 2. Magnesium 3. Bromine 4. Oxygen 5. Phosphorus 6. aluminum 7. Hydrogen 8. Helium

1. C 2. C 3. A 4. A 5. A 6. A 7. A 8. None

circle the atom in each pair that has the greater electronegativity 1. Ca or Ga 2. Br or As 3. Li or O 4. Ba or Sr 5. Cl or S 6. O or S

1. Ga 2. Br 3. O 4. Sr 5. Cl 6. O

Write the chemical formula for 1. ammonium 2. dichromate 3. oxalate 4. permanganate 5. sulfite 6. acetate 7. hydroxide 8. sulfate 9. nitrite 10. hydrogen carbonate 11. carbonate 12. nitrate 13. phosphate 14. cyanide

1. NH4+ 2. Cr2O7^2- 3. C2O4^2- 4. MnO4- 5.SO3^2- 6. CH3COO- 7. OH- 8. SO4^2- 9. NO2- 10. HCO3- 11. CO3^2- 12. NO3- 13. PO4^3- 14. CN-

Write the formulas for the following compounds 1. sodium nitrate 2. potassium acetate 3. aluminum sulfate 4. potassium dichromate 5. ammonium sulfate 6. lithium chlorate 7. magnesium nitrate 8. ammonium acetate 9. sodium sulfate 10. potassium nitrate

1. Na NO3 2. K C2H3O2 3. Al2 (SO4)3 4. K2Cr2O7 5. (NH4)2SO4 6. LiClO3 7. Mg(NO3)2 8. NH4CH3CO2 9. Na2 SO4 10. K NO3

Name the following 1. NaOH 2. NaC2H3O2 3. BaSO4 4. AlPO4 5. NaClO3 6. Ca (OH)2 7. ZnCO3 8. AgNO3

1. Sodium Hydroxide 2. Sodium Acetate 3. Barium Sulfate 4. Aluminum Phosphate 5. Sodium Chlorate 6. Calcium Hydroxide 7. Zinc Carbonate 8. Silver Nitrate

Predict which of the following ions would be likely to form (answer yes or no) 1. Na2+ 2. Cl+ 3. Ca2+ 4. Br- 5. Ne- 6. Ne+

1. no 2. no 3. yes 4. yes 5. no 6. no

which is larger, Ca2+ or Ca and why?

C because cations are smaller then their parent atom.

which is larger, F-1 or F and why?

F, because F-1 is at a stable state.

Identify three elements that form more than one cation

Fe, Ni, Cu

identify three elements that form only one cation

H, Li, Na

identify three elements that form only one anion

O2, S2- , F1-

How does the ionic radius of a nonmetal compare with its atomic radius?

The ionic radius of a nonmetal is a largest than its neutral atom. Nonmetal tend to gain electrons in the atoms current energy level.

define electronegativity

The measure of the tendency of an atom to attract a bonding pair of electrons.

What is common about most of the names of the polyatomic ions?

They end in "ate"

define an ion

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

define ion

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

what trend in electronegativity do you see as you go down a group/ family on the periodic table?

decreases

does atomic radius increase or decrease as you go across a period/ row on the periodic table and what cases this trend?

decreases; more protons pull on electrons

which element has the greatest electronegativity?

fluorine

what trend in electronegativity do you see as you go across a period/ row on the periodic table?

increases

does atomic radius increase or decrease as you go down a group on the periodic table and what causes this trend

increases; adds more energy

what trend in ionization energy do you see as you go across a period/ row on the periodic table and what causes this trend?

increases; atoms lie to have a full sub-shell

define anion

negatively charged ion

What type of elements are found in the polyatomic ions (metal/ nonmetal)?

nonmetals

What element do most of the polyatomic ions have in the formula?

oxygen

define cation

positively charged ion

define ionization energy

the amount of energy required to remove the most loosely bound electron, the valence electron of an isolated gaseous atom to form a cation.

In what region of the periodic table are these "multiple ion" elements usually located?

transition elements