Test 4 - Electrons In Atoms

45 Questions | By Jkrug | Updated: Mar 21, 2022 | Attempts: 281

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A quiz covering electron configurations, electronic orbitals, valence electrons, periodic trends, and ionization of atoms.

Questions and Answers

1.

What is the general shape of an s orbital?
- A.
  
  Spherical
- B.
  
  Four-leaf clover
- C.
  
  Cylindrical
- D.
  
  Figure-eight
2.

A cation
- A.
  
  Has a negative charge
- B.
  
  Has gained electrons
- C.
  
  Has a positive charge
- D.
  
  Has no charge
3.

According to the Heisenberg Uncertainty Principle,
- A.
  
  Electrons are added to orbitals in order of increasing energy.
- B.
  
  The number of electrons in an atom is uncertain.
- C.
  
  It is impossible to know both the velocity and position of an electron.
- D.
  
  No orbital in a sublevel may be empty if two electrons are paired in that sublevel.
4.

Which of the following atoms has the greatest ionization energy?
- A.
  
  Sulfur
- B.
  
  Silicon
- C.
  
  Chlorine
- D.
  
  Magnesium
5.

Which of the following would be the LEAST stable?
- A.
  
  An atom of N in its excited state electron configuration
- B.
  
  An ion of Na⁺
- C.
  
  An atom of P in its ground state electron configuration
- D.
  
  An atom of Ar
6.

What is the electron configuration for selenium?
- A.
  
  1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁴
- B.
  
  1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴
- C.
  
  1s²2s²3s²3p⁶4s²3d¹⁰4p⁴
- D.
  
  1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²
7.

The energy change associated with the gain of an electron is called
- A.
  
  Electronegativity
- B.
  
  Ionization energy
- C.
  
  Electron capture
- D.
  
  Electron affinity
8.

What is the maximum number of sublevels in the third energy level?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
9.

Which of the following atoms would have a very high electronegativity?
- A.
  
  Oxygen
- B.
  
  Titanium
- C.
  
  Calcium
- D.
  
  Aluminum
10.

How will an atom of magnesium obtain an octet?
- A.
  
  By losing two electrons
- B.
  
  By gaining two electrons
- C.
  
  By gaining six electrons
- D.
  
  By losing six electrons
11.

How many d orbitals are found in a zinc atom?
- A.
  
  5
- B.
  
  10
- C.
  
  1
- D.
  
  30
12.

Which of the following elements does NOT have two valence electrons?
- A.
  
  Lithium
- B.
  
  Helium
- C.
  
  Calcium
- D.
  
  Iron
13.

Which of the following elements has the largest atomic radius?
- A.
  
  Magnesium
- B.
  
  Beryllium
- C.
  
  Strontium
- D.
  
  Calcium
14.

According to Hund's Rule,
- A.
  
  Electrons are added to orbitals in order of increasing energy.
- B.
  
  The number of electrons in an atom is uncertain.
- C.
  
  It is impossible to know both the velocity and position of an electron.
- D.
  
  No orbital in a sublevel may be empty if two electrons are paired in that sublevel.
15.

How many electrons in molybdenum are found in the fourth energy level?
- A.
  
  6
- B.
  
  12
- C.
  
  13
- D.
  
  2
16.

Atoms or ions with an octet will be
- A.
  
  Anions.
- B.
  
  Noble gases.
- C.
  
  Highly electronegative.
- D.
  
  Stable.
17.

An atom of silicon will have how many valence electrons?
- A.
  
  14
- B.
  
  2
- C.
  
  8
- D.
  
  4
18.

Which of the following atoms has an octet?
- A.
  
  Chlorine
- B.
  
  Argon
- C.
  
  Sodium
- D.
  
  Nickel
19.

Which of the following elements has six valence electrons?
- A.
  
  Ba
- B.
  
  Cr
- C.
  
  Te
- D.
  
  C
20.

Which of the following atoms would have the LOWEST ionization energy?
- A.
  
  Lithium
- B.
  
  Carbon
- C.
  
  Neon
- D.
  
  Fluorine
21.

How many electrons are found in the third energy level of calcium?
- A.
  
  2
- B.
  
  6
- C.
  
  8
- D.
  
  10
22.

What is the electron configuration for scandium?
- A.
  
  1s²2s²2p⁶3s²3p⁶4s²4d¹
- B.
  
  1s²2s²2p⁶3s²3p⁶4s²3d¹
- C.
  
  1s²2s²2p⁶3s²3p⁶3d³
- D.
  
  1s²2p⁶3s²3p⁶4s²3d¹
23.

Elements that have seven valence electrons are
- A.
  
  Metals.
- B.
  
  Halogens.
- C.
  
  Noble gases.
- D.
  
  All found in Group 7 of the Periodic Table.
24.

Fluorine has a very high
- A.
  
  Atomic radius.
- B.
  
  Octet.
- C.
  
  Electron configuration.
- D.
  
  Electronegativity.
25.

What is the symbol for the gallium ion?
- A.
  
  Ga²⁺
- B.
  
  Ga⁵⁺
- C.
  
  Ga³⁺
- D.
  
  Ga⁴⁺