Question

an atoms size is determined by how far the outermost electrons are from the nucleus. the size of an atom is affected by the size of positive pull of an atoms protons. arrange the following elements in order of decreasing atomic size. rank the atoms from the largest to smallest. to rank items as equivalent, overlap them. view available hint(s) reset help br kr se ge rb largest atom smallest atom

Explanation:

Step1: Recall periodic atomic size trends

Atomic size increases down a group, decreases across a period.

Step2: Locate elements on periodic table

Rb (Group 1, Period 5); Ge (Group 14, Period 4); Se (Group 16, Period 4); Br (Group 17, Period 4); Kr (Group 18, Period 4)

Step3: Rank by size rules

Rb (largest, lower period) > Ge > Se > Br > Kr (smallest, rightmost in period)

Answer:

Largest atom: Rb, Ge, Se, Br, Smallest atom: Kr