Uranium-235 has a half life of?

Answer 1

The half-life is 700 million years !

Answer 2

700 million years

Answer 3

Uranium 235 has a half life of about 7000 million years if 1 kg of U235 is put on a shelf in a laboratory and left for 700 million years 900 g would remain. The bigger question would be how the shelf and laboratory survived that long.

Answer 4

If a rock sample is determined to have one-quarter of the uranium-235 content it had when it formed the age of the rock sample is 1.426 billion years.

Answer 5

700 million (more exactly 703,8.106) years

Answer 6

Uranium 235 halflife: 7,038.108 years

Uranium 238 halflife: 4,468.109 years

Answer 7

The full decay chain of 235U takes about 70,413,000 years. It can be seen at the related link below. (It actually starts with 239Pu as a precursor to 235U.)

Answer 8

Uranium 235 has a half-life of 700 million years.

Answer 9

2.1 billion years old

Answer 10

704 million years.