Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. a scientist who wants to date materials older than 40,000 years would most likely use ?

The answer would be uranium-238 hope this helps

Explanation:

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

lol for the pointsss