Atomic Structure Practice Test: Identifying Electron Configurations and Orbital Diagrams, Study notes of Chemistry

A practice test focused on atomic structure, covering topics such as electron configurations, orbital diagrams, and isotopic masses. Students are asked to identify the correct answers for multiple-choice questions, fill in the blanks, and complete orbital diagrams for various elements. The test also includes a section on calculating average atomic masses for elements with multiple isotopes.

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NAME: _____________________________ PER_______ DATE__________________
ATOMIC STRUCTURE PRACTICE TEST #1
1. A sample of gas is electrically charged so that it glows red. The red color is emitted when…
a. electrons in the gas sample are excited into new energy levels.
b. electrons in the gas sample return to their ground state energy levels.
c. Protons in the gas sample are excited into new energy levels.
d. Protons in the gas sample return to their ground state energy levels.
2. Electrons…
a. circle the nucleus of an atom in orbitals like the planets orbit around the sun.
b. move around the nucleus in electron clouds, that are areas of probability where the
electrons could possibly exist.
c. are located in the nucleus.
d. move in the highest energy orbitals available to them
3. The periodic table of elements is arranged as it is because…
a. the table can be arranged in energy sublevel “blocks”.
b. it can be used to find the electron configurations of atoms.
c. trends reoccur so that groups of elements share the similar chemical properties
d. all of the above
4. Chemistry and all of science moves towards states which include…
a. higher energy and high disorder.
b. higher energy and low disorder.
c. lower energy and low disorder.
d. lower energy and high disorder.
5. Fill in the blanks.
_______ energy represents ________ stability.
a. Higher, more
b. Higher, less
c. Lower, less
d. all of the above
6. Orbitals are regions of space around the nucleus where a/an _______ is likely to be located.
a. proton b. electrons c. nucleus d. neutrons
7. What is the maximum number of electrons that can exist an any d orbital.
a. 1 b. 2 c. 3 d. 4 e. 5 f. 6
8. What is the maximum number of electrons that can exist an any d sublevel.
a. 2 b. 6 c. 10 d. 12 e. 14 f. 18
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NAME: _____________________________ PER_______ DATE__________________

ATOMIC STRUCTURE PRACTICE TEST

  1. A sample of gas is electrically charged so that it glows red. The red color is emitted when… a. electrons in the gas sample are excited into new energy levels. b. electrons in the gas sample return to their ground state energy levels. c. Protons in the gas sample are excited into new energy levels. d. Protons in the gas sample return to their ground state energy levels.
  2. Electrons… a. circle the nucleus of an atom in orbitals like the planets orbit around the sun. b. move around the nucleus in electron clouds, that are areas of probability where the electrons could possibly exist. c. are located in the nucleus. d. move in the highest energy orbitals available to them
  3. The periodic table of elements is arranged as it is because… a. the table can be arranged in energy sublevel “blocks”. b. it can be used to find the electron configurations of atoms. c. trends reoccur so that groups of elements share the similar chemical properties d. all of the above
  4. Chemistry and all of science moves towards states which include… a. higher energy and high disorder. b. higher energy and low disorder. c. lower energy and low disorder. d. lower energy and high disorder.
  5. Fill in the blanks. _______ energy represents ________ stability. a. Higher, more b. Higher, less c. Lower, less d. all of the above
  6. Orbitals are regions of space around the nucleus where a/an _______ is likely to be located. a. proton b. electrons c. nucleus d. neutrons
  7. What is the maximum number of electrons that can exist an any d orbital. a. 1 b. 2 c. 3 d. 4 e. 5 f. 6
  8. What is the maximum number of electrons that can exist an any d sublevel. a. 2 b. 6 c. 10 d. 12 e. 14 f. 18
  1. Circle True or False Noble Gas (Group 18) elements have stable electron configurations and therefore are relatively unreactive.
  2. Which of the following has an invalid sublevel designation? a. 6s b. 3d c.2p d. 4d e. 3f 11 - 13. Matching a. Hund’s Rule b. Aufbau Principle c. Pauli Exclusion Principle ____11. States that any orbital can hold a maximum of two electrons with opposite spins. ____12. States that electrons fill beginning with the lowest energy levels first. ____13. States that electrons fill orbitals of the same energy (degenerate orbitals) by adding one electron to each orbital all with the same spin, and then doubling up. Fill in the blank
  3. An atom is the smallest ______ of an element which retains the ___________of that element.
  4. Fill in the following orbital diagram for Selenium (Se) 5p 4d 5s 4p 3d 4s 3p 3s 2p 2s 1s

24. FILL IN THE FOLLOWING ATOMIC STRUCTURE CHART

Nuclear Symbol

p+^ #n^0 #e-^ Atomic # Mass # Charge Hyphen

Notation 35 17 Cl 42 54 +2 XXXXXX 79 197 0 56 138 +2 XXXXXX 31 15 P

- 3 XXXXXX

50 68 46 XXXXXX

  1. A certain element “X” has five isotopes. Isotope 1 has a mass of 63.929 amu and an abundance of 48.89%. Isotopes 2 has a mass 65.926 amu and an abundance of 27.81%. Isotope 3 has a mass of 66.927 amu and a abundance of 4.11%. Isotope 4 has a mass of 67. amu and an abundance of 18.57%. Isotope 5 has a mass 69.925 amu and an abundance 0.62%. Calculate this element’s average atomic mass and using the periodic table, identify the element.