SAT Chemistry Practice Test: Atomic Structure and the Periodic Table of the Elements 1

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Question 11 questions

Time 7 minutes

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1. The two main regions of an atom are the

A. principal energy levels and energy sublevels
B. nucleus and kernel
C. nucleus and energy levels
D. planetary electrons and energy levels

2. The lowest principal quantum number that an electron can have is

A. 0
B. 1
C. 2
D. 3

3. The sublevel that has only one orbital is identified by the letter

A. s
B. p
C. d
D. f

4. The sublevel that can be occupied by a maximum of 10 electrons is identified by the letter

A. d
B. f
C. p
D. s

5. An orbital may never be occupied by

A. 1 electron
B. 2 electrons
C. 3 electrons
D. 0 electrons

6. An atom of beryllium consists of 4 protons, 5 neutrons, and 4 electrons. The mass number of this atom is

A. 13
B. 9
C. 8
D. 5

7. The number of orbitals in the second principal energy level, n = 2, of an atom is

A. 1
B. 9
C. 16
D. 4

8. Lewis structure consists of the symbol representing the element and an arrangement of dots that usually shows

A. the atomic number
B. the atomic mass
C. the number of neutrons
D. the electrons in the outermost energy level

9. Chlorine is represented by the Lewis structure . The atom that would be represented by an identical electron-dot arrangement has the atomic number

A. 7
B. 9
C. 15
D. 19

10. Radioactive changes differ from ordinary chemical changes because radioactive changes

A. involve changes in the nucleus
B. are explosive
C. absorb energy
D. release energy

11. Isotopes of uranium have different

A. atomic numbers
B. atomic masses
C. numbers of planetary electrons
D. numbers of protons