Question

An

element
has
a
half-life
of
3
years.
If
there
are
978g
of
the
element
in
a
sample,
how
much
will
be
left
after
6years.

Answer 1

Step-by-step explanation:

There will be 244.5g left after 6 years. It went through two half life 'cycles'. If you divide the original weight by 2 (halving it), that shows where it will be after 3 years. Divide by two again to find it after 6 years.