Answer
(a) palladium
(b) rhodium
(c) platinum
Work Step by Step
(a) Group 10 begins with the element nickel. The group 10 element that is in the fifth row of the periodic table is the element palladium.
(b) We are looking for the element to the left of palladium on the periodic table, which would mean that this element is in group 9 but also in the fifth row. This element would be rhodium.
(c) We are looking for the element right below palladium on the periodic table, which would mean that this element is also in group 10 but is in the sixth row. This element would be platinum.
