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Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations
1. What element has the noble gas configuration [Ne]3s23p1? __________________
2. What element has the electron configuration notation 1s22s22p63s1? ___________
3. Which of the following is the correct noble-gas notation for the element strontium?
a. [Kr]5s1
b. [Xe]5s2
c. [Kr]6s2
d. [Kr]5s2
4.
The above orbital notation is used to represent which element?
a. Boron
b. Sulfur
c. Oxygen
d. fluorine
5.
The above orbital notation is used to represent which element?
a. Phosphorus
b. Arsenic
c. Nitrogen
d. Silicon
6. Which of the following is the correct configuration notation for the element titanium (Ti)?
a. 1s22s22p63s23p64s23d2
b. 1s22s22p63s23p63d24s2
c. 1s22s22p63s23p64s24d2
d. 1s22s22p63s23p64s21d2
7. Which of the following is the correct electron configuration notation for the element nitrogen, N?
a. 1s22s2
b. 1s22s22p6
c. 1s22s22p3
d. 1s22s21p3
8. Which of the following is the correct electron configuration for an aluminum ion?
a. 1s22s22p63s23p1
b. 1s22s22p63s23p6
c. 1s22s22p6
d. 1s22s22p63s2
Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations
9. Which of the following electron dot notations is correct for the element phosphorus when it is in the
ground state?
a. I
b. II
c. V
d. III
10. Which of the following electron dot notations is correct for the element oxygen when it is in the
ground state?
a. I
b. II
c. III
d. V
11. Which of the following elements has the same number of valence electrons as the element sodium?
a. Ar
b. Cs
c. Ca
d. Mg
12. Which of the following elements has the same number of valence electrons as the element selenium?
a. Fe
b. K
c. P
d. O
13. Which of the following elements will have similar physical and chemical properties as lithium?
a. Rubidium
b. Carbon
c. Nitrogen
d. neon
14. Which of the following elements will have similar physical and chemical properties as Iodine?
a. Te
b. Xe
c. F
d. Po
Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations
15. When an electron gets excited and goes up an energy level, it has ____________ energy and when
an electron goes down an energy level, it has ____________ energy.
a. Absorbed, released
b. Released, absorbed
c. Ground, excited
d. Excited, absorbed
16. When an electron transitions from n = 3 to n = 4, it has ____________.
a. Absorbed energy
b. Released energy
c. Excited state
d. Ground state
17. When an electron transitions from n = 6 to n = 2, it has ___________.
a. Absorbed energy
b. Released energy
c. Ultraviolet radiation
d. Infrared radiation
18. What color light is produced when an electron transitions from the n = 6 to n = 2 energy level?
a. Blue
b. Red
c. No color
d. violet
19.
Given the representation of a chlorine atom, which circle might represent an atom of
bromine?
a.
Circle B
b.
Circle D
c.
None of these
d.
Circle C
Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations
20.
Given the representation of a chlorine atom, which circle might represent an atom of sulfur?
a. None of these
b. Circle B
c.
Circle D
d. Circle C
21. As one moves from left to right ( → ) within a period across the periodic table, the
electronegativity of the elements encountered tends to:
a. stay the same
b. increase
c. decrease
22. The elements with the largest atomic radii are found in the:
a. lower right-hand corner of the periodic table
b. lower left-hand corner of the periodic table
c.
upper right-hand corner of the periodic table
d. upper left-hand corner of the periodic table
Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations
23. Of the following elements, which one would have the largest radius?
a. Cesium (Cs, atomic #55)
b. Potassium (K, atomic #19)
c. Hydrogen (H, atomic #1)
d. Sodium (Na, atomic #11)
24. The energy required to remove an electron from an atom is known as:
a. radioactivity
b. electron affinity
c. ionization energy
d. electronegativity
25. Of the following elements, which one would have the largest ionization energy?
a. Cesium (Cs, atomic #55)
b. Hydrogen (H, atomic #1)
c. Sodium (Na, atomic #11)
d. Potassium (K, atomic #19)