Worksheet for Chapter 8 PSC1515
1. List the two premises of Dalton’s Atomic Theory that are not true today:
2. What part of the atom was discovered first?_____________Who
discovered it?___________________
3. What part of the atom was discovered by Rutherford?____________
4. Answer the following:
a. 65Cu has ______protons, ______electrons, and _____neutrons.
b. A Cd atom with 65 neutrons has a mass number of______.
c. If an element has an atomic number of 65 the element is_______.
d. If an element has 20 electrons the element is__________.
e. Cl-37 has _______protons, ________electrons, and _______ neutrons.
5. The elements in the periodic table are arranged in order of
increasing_______________________.
6. The atomic masses and mass numbers of elements are indicated with
units of ________________________.
7. What is the maximum number of electrons that can occupy each of the
following energy levels?
a. second_______ b. fourth__________ c. first_________
8. When an electron jumps from a higher energy level to a lower energy level
energy is ____________________ and the amount corresponds to
(absorbed or released)
a(n)____________ of energy. This chunk of energy is called a (n)
____________.
9. Indicate whether the following are in agreement with the Bohr (B) or the
quantum mechanical theory (QM) of the atom. If both apply, please
indicate this:
a. The location of the electrons is in energy
levels._______________
b. There is a probability of finding an electron in a given space at a
given time.__________________.
c. Electrons travel in orbits around the nucleus.______________
d. There are shapes associated with the location of the
electrons.___________.
e. The further away from the nucleus the higher the energy content
of the electrons.__________________
10. The elements in group IIA are called the __________________. The
elements in group VIIIA are called the _________________. The
elements in the “B” groups are called the __________________.
11. Which elements have similar chemical properties, those in the same
group or those in the same period?_____________________.
12. Indicate the number of valence electrons for each element:
a. Rb _________ b. N________ c. Br_______ d. Pb _________
13. What is the name of each of the following elements?
a. Na____________ c. Hg___________ e. I ____________
b. Mn____________ d. Mg___________ f. Ar____________
14. What is the electronic configuration for each of the following? (The
number of electrons each of these elements have in the first 3 energy
levels)
a. Al____________ b. F____________ c. Ar____________d.
He___________
15. Provide the electron dot structure for each of the following:
a.
As
b.
Sr
c.
Cs
d.
Br
e.
Xe
16. What are the charges of the ions formed by each of the following
elements?
a. Ba _____ b. N ______ c. Br _______ d. O_______ e. Al____
Answers:
1. Atoms are indivisible, atoms of the same element are identical.
2. The electron, Thomson. 3. The nucleus. 4. a. 29, 29, 36 b. 113
c. Tb d. Ca e. 17, 17, 20.
5. atomic number. 6. atomic mass units. 7. 8, 32, 2
8. released, quantum, photon
9. QM, QM, B, QM, Both 10. alkaline earth metals, halogens, transition
elements. 11. Same group 12. 1, 5, 7, 4
13. sodium, manganese, mercury, magnesium, iodine, argon.
14. a. 2-8-3 b. 2-7 c. 2-8-8
d. 2
15. a. 5 dots, only two paired. b. two dots, unpaired. c. one dot
d. 7 dots, only one unpaired. e. 8 dots, all paired.
16. a. +2 b. -3 c. -1 d. -2 e. +3