Modern Physics> half-life-of-radium...

The half life of radium is about 1600 years of 100 g of radium existing now, 25 g will remain unchanged after

(a) 3200 years

(b) 4800 years

(c) 6400 years

(d) 2400 years

Navjyot Kalra , 12 Years ago

Grade 10

1 Answers

Aditi Chauhan

(a)

100 g will become 25 g in two half lives so it is 3200 years.

Last Activity: 12 Years ago

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Modern Physics> half-life-of-radium...

The half life of radium is about 1600 years of 100 g of radium existing now, 25 g will remain unchanged after (a) 3200 years (b) 4800 years (c) 6400 years (d) 2400 years

Navjyot Kalra , 12 Years ago

Aditi Chauhan

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The half life of radium is about 1600 years of 100 g of radium existing now, 25 g will remain unchanged after

(a) 3200 years

(b) 4800 years

(c) 6400 years

(d) 2400 years

A nucleus X¹⁸⁴ at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is

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