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STUDY GUIDE
ELECTRONS IN THE ATOM
Answer question in the textbook: Ch 5 RQ 47; 50; 56;58;61;80; 102, 103,104
1.
The charge of the nucleus of an atom is ________________________________________________________________
Explain your answer _______________________________________________________________________________
2.
How does the energy of an electron change when the electron moves closer to the nucleus?
________________________________________________________________________________________________
3.
In Bohr's model of the atom, where are the electrons and protons located?
_______________________________________________________________________________________________
4.
Who discovered the electron? _______________________________________________________________________
Nucleus? ________________________________________________________________________________________
5.
The principal quantum number indicates what property of an electron? _______________________________________
6.
When an electron moves from a lower to a higher energy level, the electron ___________________ a quantum of
energy
How many energy sublevels are there in the following energy levels
1st ______ 2nd _________ 3rd __________ 4th ________________
7.
8.
What is the maximum number of electrons in the following energy levels
1st ______ 2nd _________ 3rd __________ 4th ________________
9.
What types of atomic orbitals are in the following energy levels?
1st ______________ 2nd ________________ 3rd _________________ 4th ____________________
10. Write electron configuration notation for He _____________ Ne ___________________ Ar ___________________
11. Write electron configuration notation for N _____________ F ___________________ S ___________________
12. Write noble gas electron configuration notation for N ______________ F _______________S ___________________
13. What is the probability of finding an electron within the region indicated by the drawn electron cloud?
____________________________________________________________________________________14. The formula 2n2 represents _______________________________________________________________
15. In the periodic table; what shows you the number of the electrons on the outermost level?
_________________________________________
16. What is the number of electrons in the outermost energy level of the following atoms
O _____________ Si ___________ Ca _________ P ________ I ___________ Al ___________
17. In the electron configuration notations what does the sum of superscripts show?
18. Draw Lewis dot diagrams for the following atoms:
K
Be
Br
P
B
Ar
Textbook. Ch 5
47
How many energy sublevels are contained in each of the hydrogen atom’s first three energy levels? (5.2)
50
What do the sublevel designations s, p, d, and f specify with respect to the atom’s orbitals? (5.2)
56
How is an orbital’s principal quantum number related to the atom’s major energy levels? (5.2)
58
In what sequence do electrons fill the atomic orbitals related to a sublevel? (5.3)
61
What are valence electrons? How many of a magnesium atom’s 12 electrons are valence electrons? (5.3)
64
How many electrons are shown in the electron dot structures of the following elements? (5.3) Draw dot structure
a. carbon
b. Iodine
c. Calcium
d. gallium
80
What elements are represented by each of the following electron configurations?
a. 1s22s22p5 _________________________ [Ar]4s2 ______________________ [Xe]6s24f4 _________________________
102
Identify each of the following as either chemical or physical properties of the substance. Explain your answer
(Chapter 3)
a. mercury is a liquid at room temperature __________________________ _____________________________
b. sucrose is a white, crystalline solid __________________________ _____________________________
c. iron rusts when exposed to moist air __________________________ _____________________________
d. paper burns when ignited __________________________ _____________________________
103
Identify each of the following as a pure substance or a mixture. (Chapter 3)
a. distilled water __________________________ _____________________________
b. orange juice with pulp __________________________ _____________________________
c. smog __________________________ _____________________________
d. diamond __________________________ _____________________________
e. milk __________________________ _____________________________
f. copper metal __________________________ _____________________________
104
An atom of gadolinium has an atomic number of 64 and a mass number of 153. How many electrons, protons, and
neutrons does it contain? (Chapter 4)
CHALLENGING QUESTION
FOR THE 4TH PERIOD ELEMENTS
4 s energylevel has less energy than 3d level
3d level has less energy that 4p level
Write noble gas notation for electrons configuration for the following atoms: d orbital can hold
maximum 10 electrons.
K ________________________________________________________________
Ca ________________________________________________________________
Sc ________________________________________________________________
Ti ________________________________________________________________
Va ________________________________________________________________
Zn ________________________________________________________________
Ga ________________________________________________________________
REVIEW YOUR TEST FOR CHAPTER 4
KNOW THE VOCABULARY
Practice writing electron configuration notations (your WS with Group A elements)