list these elements in order of decreasing atomic radius: ni, pt, ds, pd → ____, ____, ____, ____
list these elements in order of decreasing atomic radius: ni, pt, ds, pd → ____, ____, ____, ____
Answer
Explanation:
Step1: Recall atomic - radius trend
Atomic radius generally increases down a group and decreases across a period in the periodic table. Ni (Nickel) is in period 4, Pd (Palladium) is in period 5, Pt (Platinum) is in period 6, and Ds (Darmstadtium) is in period 7.
Step2: Order elements
Since the period number represents the number of electron - shells (more electron - shells mean larger atomic radius), the order of decreasing atomic radius is based on the period number.
Answer:
Ds, Pt, Pd, Ni