Anoble gas in the same period as zr

Xenon

Explanation:

Zr or Zirconium is in period 5 just as Xenon is. Periods are the same as rows so essentially they are both in row 5. All noble gases are found in group (column) 8

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock