Pre AP Study Guide – Unit 3
1) What is an atom?
2) Who was the originator of the atomic theory?
3) This is a dense region of the atom that has a positive charge. Why does this region have a positive charge?
4) Explain the relationship between the mass of a neutron and the mass of a proton.
5) Atoms of elements have a mass unit called the amu (atomic mass unit). What atomic particles affect an atoms’ amu?
6) This is the region where electrons reside.
7) What is the charge of a proton? Neutron? Electron?
8) Protons and electrons of an atom are equal to what?
9) How do you calculate the number of neutrons in an atom?
10) This is an atom of an element that has a different mass. Why does this atom have a different mass?
11) Find the number of P, N, and E in Carbon – 12 and Carbon – 13
12) Who created the periodic table (Check the notes)
13) What is a mass number?
14) Approximately how many elements on the periodic table are naturally occurring?
15) How many groups on the periodic table?
16) What does the group number tell us about an atom?
17) What does the period number tell us about an atom?
18) Tell me names for the following groups:
Group 1:
Group 2:
Groups 3-12:
Group 13:
Group 14:
Group 15:
Group 16:
Group 17:
Group 18:
19) Give me the names of the following periods:
Period 6:
20) What is a valence electron?
Period 7:
21) How many valence electrons on the:
1st energy level:
2nd energy level:
3rd energy level:
4th energy level:
22) What does a Lewis Dot Structure tell us about an atom?
23) Show me the LDS of :
Li
Br
Se
Al
Si
Ar
24) What are the three types of elements?
25) What is a diatomic element?
26) Name the 7 diatomic elements:
27) Find the number of neutrons in strontium
28) All of the 50 element symbols we learned are fair game on the test
29) What is a metalloid? Name three of them. What is a metal? What is a nonmetal?
30) Find the average atomic mass of lithium if 7.42% exists as Lithium – 6 and 92.58% exists as Lithium – 7
31) Know how to find and calculate atomic #, avg. atomic mass, P, N, and E
32) Find P, N, and E of:
28
13 Al
33) Study Element Mystery Worksheet and be able to identify elements by their electron energy levels and their valence
electrons
34) Draw an energy level (Bohr) diagram for the following elements:
H
B
Al
Ar
Sr
Se
35) What determines the reactivity of an atom?
37) Make sure you can do density, thermal energy, kinetic energy, and convert using the metric system.
38) Complete a half life series for the following question and answer the questions below:
A) The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes
has elapsed?
B. How much would be left after 7 half lives?
39) Determine the age of a bone using Carbon-14 dating. 10 g of bone from a dinosaur is found to have a certain amount of
Carbon-14 emissions. How long ago was there 160 g of bone if Carbon-14 has a half life of 5,730 years?
40) Write the orbital notation for Calcium
41) What is the electron configuration of Selenium
42) Write the noble gas notation for Bromine
43) Write the orbital notation, electron configuration, and noble gas notation for uranium
44) Name the scientists responsible for contributions to the Atomic Theory and explain what the contributed (need to be
detailed here because there will be multiple questions on this).
45) Make sure you are able to compare the stability of nuclei based on their half life.
46) Anything else in the notes that we have gone over is fair game. Don’t think about specifics. Think more about the
application of the material and the connections that can be made throughout this unit.