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Which of the isotopes are radioactive? Check all that apply.

hydrogen-1
hydrogen-3
helium-4
carbon-14
uranium-235
copernicium-277
fermium-252
carbon-12

User Kwana
by
3.4k points

2 Answers

7 votes

Answer:

hydrogen-3

carbon-14

uranium-235

copernicium-277

fermium-252

:)

Step-by-step explanation:

User Arhowk
by
3.8k points
2 votes

Answer:

here you go

Step-by-step explanation:

hydrogen-3

carbon-14

uranium-235

copernicium-277

fermium-252

User Sanwuwy
by
3.3k points