Name: ____________
Period: ____
Midterm Review – Part 1
1. Draw the Lewis dot structure for K, Mg, C, and F
2. When atoms of Mg react with N a compound is formed. Which of the following is the most likely formula
for the compound?
a) MgN
3.
b) MgN2
c) Mg2N3
d) Mg3N2
Describe the shapes of S and P orbitals:
4. What were the two main conclusions of the Rutherford gold foil experiment?
5. Convert the following units:
20kg = ____ g
35g = ____ mg
491g = ____ kg
6. Density =
mass
volume
A block of metal is 4cm x 3cm x 10cm. What is the density of the metal if it has a mass of 300g?
7. Use your class room text book to define polar bond.
8. Why is O-H a polar bond, while C-C is non-polar?
Midterm Review – Part 2
9.
An unknown element, X, combines with sulfur (S) to form the compound XN. The element X is most likely:
a)
Na
b)
Be
c)
Al
d)
Sn
10. Which is the correct name for NF3?
a)
mononitrogen fluoride
b)
mononitrogen trifluoride
c) nitrogen trifluoride
d) nitrogen fluoride
dipotassium monosulfide
c) dipotassium sulfide
d) potassium sulfate
11. Which is the correct name for K2S?
a)
potassium sulfide
b)
12. Why are noble gas atoms non-reactive?
13. Define the following:
-
excited state
-
ground state
-
Bohr atom
14. Why do elements emit a bright-line spectra?
15. Protons and neutrons make up the mass of an atom, and they each have a mass of one. Why are the atomic masses of
elements not whole numbers?
16. What is the same for elements of the same vertical group of the periodic table?
17. Name the elements that have the smallest and greatest electronegativity values?
18. Metals make up about 2/3 of the elements of the periodic table. Name 3 properties of metals:
Midterm Review – Part 3
19. Ions are charged particles. Describe the difference between cations and anions and state how they are formed?
20. Scientists use the Scientific Method to solve problems. What is the difference between an observation and a
conclusion?
21. Mixtures can be separated by physical methods, such as filtration and evaporation. How can chemical compounds be
broken down into their elements?
22. List the parts of the electromagnetic spectrum:
23. What happens when an electron moves from an excited state to its ground state?
24. Which of the following is the most modern theory of the atom?
a)
Quantum
b) Bohr
c) Dalton
d) Democritus’
25. How do ionic bonds and covalent bonds differ in the way they interact with electrons?
26. Define the Conservation of Mass.
27. Complete the following chart:
Element
Atomic #
Mass #
# of
protons
6
Ca
# of
neutrons
charge
7
41
16
28. Draw the Lewis Structure for
a. CBr4
b. NI3
# of
electrons
c. CS2
15
2-