After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. the decay that is present is gamma decay because gamma decay has photons which has no mass unlike alpha and beta decay.

5 0

3 years ago

Suppose that 0.50 grams of barium-131 are administered orally to a patient. Approximately how many milligrams of the barium woul

nalin [4]

Two months later 13.8 milligrams of the barium-131 still be radioactive.

<h3>How is the decay rate of a radioactive substance expressed ? </h3>

It is expressed as:

$A = A_{0} \times (\frac{1}{2})^{t/T}$

where,

A = Amount remaining

A₀ = Initial Amount

t = time

T = Half life

Here

A₀ = 0.50g

t = 2 months = 60 days

T = 11.6 days

Now put the values in above expression we get

$A = A_{0} \times (\frac{1}{2})^{t/T}$

$= 0.50 \times (\frac{1}{2})^{60/11.6}$

$= 0.50 \times (\frac{1}{2})^{5.17}$

= 0.50 × 0.0277

= 0.0138 g

= 13.8 mg [1 mg = 1000 g]

Thus from the above conclusion we can say that Two months later 13.8 milligrams of the barium-131 still be radioactive.

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Question: Suppose that 0.50 grams of ban that 0.50 grams of barium-131 are administered orally to a patient. Approximately many milligrams of the barium would still be radioactive two months later? The half-life of barium-131 is 11.6 days.

3 0

1 year ago

Anthracite is so hard and pure it is also referred to as a _____. renewable resource metamorphic rock hot bituminous coal dirty

jekas [21]

Anthracite is so hard and pure it is also referred to as a metamorphic rock. renewable resource metamorphic rock hot bituminous coal dirty fuel

3 0

2 years ago

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