Answer:
AWWWWWWWWWWWWWWWW SOOO NICEEE
Cadium
Down a period, atomic radii decrease from left to right due to the increase in the number of protons and electrons across a period.
Kilometers, Meters and centimeters if metric
Feet, inches, yards and miles if customary ( u.s.)
Stars born larger than 8 solar masses usually retain enough mass to undergo core collapse, with the resulting shock wave producing a Type Ib supernova (spectra without Hydrogen or Silicon lines, with Helium lines), a Type Ic supernova (without Hydrogen or Helium or Silicon lines) or a Type II supernova
I hope it’s what you need