Multiple Choice

1. The size of an element’s atomic radius __________ from left to right across the periodic table.

a. increases b. decreasesc. 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, Mgc. 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 energiesb. They have low electron affinitiesc. They have high electron affinitiesd. They don’t; they form cations

4. Name the only element touching the stair-step line that is NOT a metalloida. Aluminum b. Boronc. Nitrogen d. Astatine

5. When a metal atom becomes a cation…a. It gains an electronb. It becomes a different isotopec. Its atomic number changesd. Its ionic radius is smaller than its atomic radius

6. Ionization energy is measured in atoms whena. They are in a gaseous stateb. They are ionsc. They are in a solid stated. They are at 25°C

7. Electron affinity…a. Is always positiveb. May be positive or negativec. Is always negatived. Is typically higher in metals than nonmetals

8. Al2O3 is…a. Called dialuminum trioxideb. Impossible to formc. Not a true oxided. Amphoteric

9. How many valence electrons does one atom of copper have?a. 9 b. 10c. 2 d. 1

10. Arrange the following elements in order of increasing effective nuclear charge: Bi, As, P, N, Sb

a. Bi, Sb, As, P, N b. N, P, As, Sb, Bic. Bi, As, P, N, Sb d. N, As, P, Bi, Sb

11. Of Fe, K, P, and Cl, which would you expect to have the greatest electron affinity?a. K b. Fec. Cl d. P

12. Unknown element X has four energy levels, five valence electrons, and is a metalloid. What is element X?

a. Si b. Gec. Se d. As

13. The electron affinity of chlorine is 349 kJ/mol. What is the correct equation for the formation of chloride?

a. Cl (s) + e- → Cl- (s) + 349 kJb. Cl (g) + e- → Cl- (g) + 349 kJc. Cl (s) + 349 kJ + e- → Cl- (s)d. Cl (g) + 349 kJ + e- → Cl- (g)

14. 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 coreb. The second electron is a valence electronc. The atom has a larger radius after the first electron is removedd. It’s not higher than the first ionization energy

15. Boron and silicon form similar compounds and are very similar due to their ________ relationship

a. periodic b. familial c. chemical d. diagonal

16. An element with a greater effective nuclear charge has a(n) ______ atomic radiusa. larger b. smallerc. undefined d. undulating

17. 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

18. The first ionization energy of beryllium is 899 kJ/mol and the second ionization energy is 1,757 kJ/mol. How much energy would it take to remove the valence electrons from two moles of beryllium?

a. 5,312 kJ b. 2,656 kJc. 4,413 kJ d. 10,704 kJ

19. What is NOT true of the element rubidium?a. It is an alkali metal b. It has one valence electronb. It has a low electron affinity d. Its radius is larger than cesium’s

20. What is true of the oxide formed when magnesium reacts with oxygen?a. Its formula is Mg2O b. It is molecularb. It is basic d. It is amphoteric