Law of Radioactive decay
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NUCLEAR PHYSICS

147895 A radioactive substance has a half-life of four months. Three-fourth of substance will decay in

1 3 months
2 4 months
3 8 months
4 12 months
J and K CET- 2006
NUCLEAR PHYSICS

147896 A radioactive substance decays to $1 / 16^{\text {th }}$ of its initial activity in $\mathbf{4 0}$ days. The half-life of the radioactive substance expressed in days is

1 2.5
2 5
3 10
4 20
J and K CET- 2001
NUCLEAR PHYSICS

147897 $1 \mathrm{mg}$ of radium has $2.68 \times 10^{18}$ nuclei. Its half life is 1620 years. After 3240 years how many nuclei would have disintegrated ?

1 $1.82 \times 10^{18}$
2 $1.34 \times 10^{18}$
3 $0.67 \times 10^{18}$
4 $2.01 \times 10^{18}$
J and K CET- 2000
NUCLEAR PHYSICS

147899 The half-life period of a sample of radioactive substance is $T$. If we take a sample of $20 \mathrm{~g}$, how much substance (approximately) will be undecayed after time $T / 2$ ?

1 $16 \mathrm{~g}$
2 $14 \mathrm{~g}$
3 $12 \mathrm{~g}$
4 $10.5 \mathrm{~g}$
J and K CET- 1997
NUCLEAR PHYSICS

147900 Polonium has a half-life of 140 days. If we take $20 \mathrm{~g}$ of polonium initially then the amount of it that remains after 280 days is

1 $2.5 \mathrm{~g}$
2 $5 \mathrm{~g}$
3 $10 \mathrm{~g}$
4 $15 \mathrm{~g}$
J and K CET-2013
NEET DIGITAL LIBRARY
NUCLEAR PHYSICS

147895 A radioactive substance has a half-life of four months. Three-fourth of substance will decay in

1 3 months
2 4 months
3 8 months
4 12 months
J and K CET- 2006
NUCLEAR PHYSICS

147896 A radioactive substance decays to $1 / 16^{\text {th }}$ of its initial activity in $\mathbf{4 0}$ days. The half-life of the radioactive substance expressed in days is

1 2.5
2 5
3 10
4 20
J and K CET- 2001
NUCLEAR PHYSICS

147897 $1 \mathrm{mg}$ of radium has $2.68 \times 10^{18}$ nuclei. Its half life is 1620 years. After 3240 years how many nuclei would have disintegrated ?

1 $1.82 \times 10^{18}$
2 $1.34 \times 10^{18}$
3 $0.67 \times 10^{18}$
4 $2.01 \times 10^{18}$
J and K CET- 2000
NUCLEAR PHYSICS

147899 The half-life period of a sample of radioactive substance is $T$. If we take a sample of $20 \mathrm{~g}$, how much substance (approximately) will be undecayed after time $T / 2$ ?

1 $16 \mathrm{~g}$
2 $14 \mathrm{~g}$
3 $12 \mathrm{~g}$
4 $10.5 \mathrm{~g}$
J and K CET- 1997
NUCLEAR PHYSICS

147900 Polonium has a half-life of 140 days. If we take $20 \mathrm{~g}$ of polonium initially then the amount of it that remains after 280 days is

1 $2.5 \mathrm{~g}$
2 $5 \mathrm{~g}$
3 $10 \mathrm{~g}$
4 $15 \mathrm{~g}$
J and K CET-2013
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NUCLEAR PHYSICS

147895 A radioactive substance has a half-life of four months. Three-fourth of substance will decay in

1 3 months
2 4 months
3 8 months
4 12 months
J and K CET- 2006
NUCLEAR PHYSICS

147896 A radioactive substance decays to $1 / 16^{\text {th }}$ of its initial activity in $\mathbf{4 0}$ days. The half-life of the radioactive substance expressed in days is

1 2.5
2 5
3 10
4 20
J and K CET- 2001
NUCLEAR PHYSICS

147897 $1 \mathrm{mg}$ of radium has $2.68 \times 10^{18}$ nuclei. Its half life is 1620 years. After 3240 years how many nuclei would have disintegrated ?

1 $1.82 \times 10^{18}$
2 $1.34 \times 10^{18}$
3 $0.67 \times 10^{18}$
4 $2.01 \times 10^{18}$
J and K CET- 2000
NUCLEAR PHYSICS

147899 The half-life period of a sample of radioactive substance is $T$. If we take a sample of $20 \mathrm{~g}$, how much substance (approximately) will be undecayed after time $T / 2$ ?

1 $16 \mathrm{~g}$
2 $14 \mathrm{~g}$
3 $12 \mathrm{~g}$
4 $10.5 \mathrm{~g}$
J and K CET- 1997
NUCLEAR PHYSICS

147900 Polonium has a half-life of 140 days. If we take $20 \mathrm{~g}$ of polonium initially then the amount of it that remains after 280 days is

1 $2.5 \mathrm{~g}$
2 $5 \mathrm{~g}$
3 $10 \mathrm{~g}$
4 $15 \mathrm{~g}$
J and K CET-2013
For More Updates join with Us
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NUCLEAR PHYSICS

147895 A radioactive substance has a half-life of four months. Three-fourth of substance will decay in

1 3 months
2 4 months
3 8 months
4 12 months
J and K CET- 2006
NUCLEAR PHYSICS

147896 A radioactive substance decays to $1 / 16^{\text {th }}$ of its initial activity in $\mathbf{4 0}$ days. The half-life of the radioactive substance expressed in days is

1 2.5
2 5
3 10
4 20
J and K CET- 2001
NUCLEAR PHYSICS

147897 $1 \mathrm{mg}$ of radium has $2.68 \times 10^{18}$ nuclei. Its half life is 1620 years. After 3240 years how many nuclei would have disintegrated ?

1 $1.82 \times 10^{18}$
2 $1.34 \times 10^{18}$
3 $0.67 \times 10^{18}$
4 $2.01 \times 10^{18}$
J and K CET- 2000
NUCLEAR PHYSICS

147899 The half-life period of a sample of radioactive substance is $T$. If we take a sample of $20 \mathrm{~g}$, how much substance (approximately) will be undecayed after time $T / 2$ ?

1 $16 \mathrm{~g}$
2 $14 \mathrm{~g}$
3 $12 \mathrm{~g}$
4 $10.5 \mathrm{~g}$
J and K CET- 1997
NUCLEAR PHYSICS

147900 Polonium has a half-life of 140 days. If we take $20 \mathrm{~g}$ of polonium initially then the amount of it that remains after 280 days is

1 $2.5 \mathrm{~g}$
2 $5 \mathrm{~g}$
3 $10 \mathrm{~g}$
4 $15 \mathrm{~g}$
J and K CET-2013
NEET DIGITAL LIBRARY
NUCLEAR PHYSICS

147895 A radioactive substance has a half-life of four months. Three-fourth of substance will decay in

1 3 months
2 4 months
3 8 months
4 12 months
J and K CET- 2006
NUCLEAR PHYSICS

147896 A radioactive substance decays to $1 / 16^{\text {th }}$ of its initial activity in $\mathbf{4 0}$ days. The half-life of the radioactive substance expressed in days is

1 2.5
2 5
3 10
4 20
J and K CET- 2001
NUCLEAR PHYSICS

147897 $1 \mathrm{mg}$ of radium has $2.68 \times 10^{18}$ nuclei. Its half life is 1620 years. After 3240 years how many nuclei would have disintegrated ?

1 $1.82 \times 10^{18}$
2 $1.34 \times 10^{18}$
3 $0.67 \times 10^{18}$
4 $2.01 \times 10^{18}$
J and K CET- 2000
NUCLEAR PHYSICS

147899 The half-life period of a sample of radioactive substance is $T$. If we take a sample of $20 \mathrm{~g}$, how much substance (approximately) will be undecayed after time $T / 2$ ?

1 $16 \mathrm{~g}$
2 $14 \mathrm{~g}$
3 $12 \mathrm{~g}$
4 $10.5 \mathrm{~g}$
J and K CET- 1997
NUCLEAR PHYSICS

147900 Polonium has a half-life of 140 days. If we take $20 \mathrm{~g}$ of polonium initially then the amount of it that remains after 280 days is

1 $2.5 \mathrm{~g}$
2 $5 \mathrm{~g}$
3 $10 \mathrm{~g}$
4 $15 \mathrm{~g}$
J and K CET-2013