Question

question 27 (1 point)
which of the following elements is a transition metal?
o a tin
o b tellurium
o c copper
o d cesium
question 28 (1 point)
which of the following is true about the electron configurations of the representative elements?
o a the electrons with the highest energy are in a d sublevel.
o b the highest occupied s and p sublevels are partially filled.
o c the electrons with the highest energy are in an f sublevel.
o d the highest occupied s and p sublevels are completely filled.
question 29 (1 point)
of the elements fe, hg, u, and te, which is a representative element?
o a u
o b hg
o c fe
o d te

Explanation:

Question 27

• Tin (\(Sn\)) is a post - transition metal (group 14, main - group metal).
• Tellurium (\(Te\)) is a metalloid (group 16).
• Copper (\(Cu\)) is a transition metal (group 11, \(d\) - block element).
• Cesium (\(Cs\)) is an alkali metal (group 1, main - group metal).

• Representative elements (main - group elements) have their highest - energy electrons in \(s\) or \(p\) sublevels.
• For representative elements, the highest occupied \(s\) and \(p\) sublevels are partially filled (except for noble gases which have completely filled \(s\) and \(p\) sublevels, but noble gases are also considered as a special case of representative elements in some classifications).
• Transition metals have electrons in \(d\) sublevels and inner - transition metals have electrons in \(f\) sublevels as their highest - energy electrons (in some cases for inner - transition).

• \(Fe\) (iron) is a transition metal (\(d\) - block element).
• \(Hg\) (mercury) is a transition metal (\(d\) - block element).
• \(U\) (uranium) is an inner - transition metal (\(f\) - block element).
• \(Te\) (tellurium) is a representative element (group 16, \(p\) - block element, main - group element).

Answer:

C. copper

Question 28