Explanation:
mass -2kg
energy -16j
2
k.e -1/2mv
16j= 1/2×2×V
16× 2/2 =V
16 = V
√16= V
V= 4m/s
Then
momentum=MV
=2×4
=8kgm/s
Answer:
B. flourine
Flourine is the 9th element in the periodic table
