Question

which of the following groupings contains only representative elements?
o a ni, fe, zn
o b al, mg, li
o c hg, cr, ag
o d cu, co, cd
question 20 (1 point)
which of the following is true about the electron configurations of the representative elements?
o a the highest occupied s and p sublevels are partially filled
o b the electrons with the highest energy are in a d sublevel
o c the highest occupied s and p sublevels are completely filled
o d the electrons with the highest energy are in an f sublevel
question 21 (1 point)
what are the group 1a and group 7a elements examples of?
o a transition elements
o b representative elements
o c nonmetallic elements
o d noble gases
question 22 (1 point)
of the elements fe, hg, u, and te, which is a representative element?
o a hg
o b fe
o c te

Explanation:

• Question 1: Representative elements are in groups 1A - 8A. Al (Group 13/3A), Mg (Group 2/2A), Li (Group 1/1A) are representative. Ni, Fe, Zn (transition metals), Hg, Cr, Ag (transition metals), Cu, Co, Cd (transition metals) are not.
• Question 2: Representative elements have highest - occupied s and p sublevels partially filled. Transition elements have electrons in d sublevel (highest energy for some), f - block elements have electrons in f sublevel.
• Question 3: Group 1A and 7A are in the main - group (representative) elements. Transition elements are in d - block, non - metallic elements is a broader category (not specific to 1A and 7A), noble gases are Group 8A.
• Question 4: Te (Tellurium) is in Group 16/6A (representative). Fe (transition metal), Hg (transition metal), U (actinide, f - block).

Answer:

• Question 1: B. Al, Mg, Li
• Question 2: A. The highest occupied s and p sublevels are partially filled
• Question 3: B. representative elements
• Question 4: C. Te