- 1. Which of these elements is the most electronegative?
A) phosphorous
B) chlorine
C) argon
D) sulfur
- 2. Different types of waves are found in the electromagnetic spectrum. List the waves in order of increasing wavelengths.
A) gamma rays, X-ray, ultraviolet waves, infrared, microwaves, and radio waves
B) radio waves, microwaves, infrared, gamma rays, ultraviolet waves, and X-ray
C) ultraviolet waves , X-ray, gamma rays, infrared, microwaves, and radio waves
D) infrared, ultraviolet waves, microwaves, radio waves, gamma rays, and X-ray
- 3. Wave A and wave B are similar waves that are being compared. If the wavelength in wave B is doubled, how would its frequency change?
A) Wave B's frequency would be cut in half.
B) Wave B's frequency would be cut by a fourth.
C) Wave B's frequency would be doubled.
D) Wave B's frequency would be multiplied by a factor of four.
- 4. Moseley's research suggested that elements should be sorted by increasing atomic -
A) number
B) stability
C) mass
D) radius
- 5. Mendeleev organized his periodic table in order of increasing atomic —
A) mass
B) stability
C) radius
D) number
- 6. Which two factors of the electromagnetic radiation have an inverse relationship?
A) energy and frequency
B) frequency and wavelength
C) amplitude and nodes
D) wavelength and energy
- 7. Some physical properties of elements in a group of the Periodic Table are described below. -Poor conductor of electricity -Poor conductor of thermal energy -Atoms contain seven (7) valence electrons -Brittle in the solid state -Low melting points and boiling points
A) Alkali metals
B) Halogens
C) Noble gas
D) Alkaline earth metals
- 8. Which of the following is a physical property that Mendeleev used to design the periodic table?
A) Reactivity with metals
B) Crystalline structure
C) Oxidation state
D) Atomic weight
- 9. After Mendeleev constructed the periodic table, he predicted the discovery of several elements that were not yet known. What prediction was Mendeleev able to make about these unknown elements, based on his table?
A) electron structures of their atoms
B) their relative abundance in various mineral deposits
C) electron structures of their atoms
D) chemical and physical properties
- 10. Which model of the atom was used as a result of JJ Thomson's cathode ray experiments?
A) Plum pudding model
B) Nuclear model
C) Planetary model
D) Quantum mechanical model
- 11. The ionization energy of potassium is greater than that of —
A) magnesium
B) lithium
C) sodium
D) cesium
- 12. Lead has an average atomic mass of 207.2. Three naturally occurring isotopes of lead are listed in the table below along with the percent abundance of two of the isotopes. Isotope Percent Abundance Pb - 206 26.3% Pb - 207 ? Pb - 208 47.4%
A) 73.7%
B) 26.3%
C) 36.9%
D) 21.1%
- 13. Which three elements have the most similar chemical properties?
A) B, C, N
B) O, N, Si
C) Ar, Kr, Br
D) K, Rb, Cs
- 14. Which conclusion was a direct result of the gold foil experiment?
A) An electron has properties of both waves and particles.
B) An electron has a positive charge and is located inside the nucleus.
C) An atom is mostly empty space with a dense, positively charged nucleus.
D) An atom is composed of at least three types of subatomic particles.
- 15. What is the average atomic mass of neon? Isotope Mass # (g) % Abundance Ne‐ 20 20 90.48 Ne‐ 21 21 0.27 Ne‐ 22 22 9.25
A) 20.19 amu
B) 10.50 amu
C) 2018.77 amu
D) 21.00 amu
- 16. What atom matches this electron configuration? 1s2/2s2/2p6/3s23p6/4s2/3d10/4p65s2/4d10/5p6/6s2/4f14/5d9
A) silver
B) barium
C) gold
D) mercury
- 17. What is the electron configuration for a Sulfur atom?
A) 3p4
B) 1s2/2s2/2p6/3s2/3p4
C) 1s2/2s2/2p6/3p6
D) 1s2/2s2/2p6/3s2/3p6
- 18. How many electrons does Si contain?
A) 28
B) 14
C) 15
D) 12
- 19. What is the oxidation number of oxygen?
A) -2
B) 4
C) +2
D) 6
- 20. The electron configuration of an atom is 1s2/2s2/2p6. The number of electrons in the atom is
A) 8
B) 4
C) 6
D) 10
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