# PHYSICS/MATHS HELP!?

Sodium 24 is a radioactive isotope with a half-life of 14.8horus. Calculate:

A) The decay constant of the isotope.

B) The number of atoms in a 1.0mg sample of this isotope.

C) The activity of the 1.0mg pure sample of the isotope.

D) The activity of such a sample exactly 24 hours later.

A) The decay constant of the isotope.

B) The number of atoms in a 1.0mg sample of this isotope.

C) The activity of the 1.0mg pure sample of the isotope.

D) The activity of such a sample exactly 24 hours later.

Update:
CALCIUM 43 IS AN ISOTOPE WITH A HALF LIFE OF 22 DAYS. CALCULATE THE DECAY CONSTANT, ACTIVITY OF 2.3MG SAMPLE AND ACTIVITY 48 HOURS LATER

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