Multiple Choice
1. The size of an element’s atomic radius __________ from left to right across the periodic table.
a. increases b. decreases
c. remains constant d. is randomly assigned
2. Arrange the following elements from lowest to highest ionization energy: Be, Mg, Ca, Rb, Sr
a. Be, Mg, Ca, Rb, Sr b. Rb, Sr, Ca, Be, Mg
c. Rb, Sr, Ca, Mg, Be d. Be, Mg, Ca, Sr, Rb
3. The halogens tend to form anions because….
a. They have low first ionization energies
b. They have low electron affinities
c. They have high electron affinities
d. They don’t; they form cations
4. Name the only element touching the stair-step line that is NOT a metalloid
a. Aluminum b. Boron
c. Nitrogen d. Astatine
5. When a metal atom becomes a cation…
a. It gains an electron
b. It becomes a different isotope
c. Its atomic number changes
d. Its ionic radius is smaller than its atomic radius
6. What is NOT true of the element rubidium?
a. It is an alkali metal b. It has one valence electron
b. It has a low electron affinity d. Its radius is larger than cesium’s
7. In Al2O3, aluminum ion has a charge of...
a. +2 b. -2
c. +3 d. -3
8. How many valence electrons does one atom of phosphorus have?
a. 1 b. 5
c. 3 d. 7
9. Arrange the following elements in order of increasing electron affinity: Bi, As, P, N, Sb
a. Bi, Sb, As, P, N b. N, P, As, Sb, Bi
c. Bi, As, P, N, Sb d. N, As, P, Bi, Sb
10. Of Fe, K, P, and Cl, which would you expect to have the greatest electron affinity?
a. K b. Fe
c. Cl d. P
11. Unknown element X has four energy levels, five valence electrons, and is a metalloid. What is element X?
a. Si b. Ge
c. Se d. As
12. The second ionization energy of sodium is much higher than the first ionization energy because…
a. The second electron is removed from an already-stable noble gas core
b. The second electron is a valence electron
c. The atom has a larger radius after the first electron is removed
d. It’s not higher than the first ionization energy
13. Boron and silicon form similar compounds and are very similar due to their ________ relationship
a. periodic b. familial
c. chemical d. group
14. An element with a greater effective nuclear charge has a(n) ______ atomic radius
a. larger b. smaller
c. undefined d. undulating
15. Lanthanides and actinides have these kinds of orbitals:
a. s only b. s, p and d
c. s, p, d, and f d. f only
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