How do i give the protons, electrons, and neutrons for an isotopes.
for example: iodine-127
iodine-126
iodine-128
if you know me not to answer it but also to understand it.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Light waves can move through , but they travel fastest when they move through a(n) .