A particular element has the following set of properties:

It has a low melting point.
It has a low boiling point
It exists as a two-atom molecule in the gas phase.
It has seven outer electrons.
It readily reacts with metals to produce a salt.

Which element does the list describe?

A.
bromine (Br)
B.
strontium (Sr)
C.
potassium (K)
D.
krypton (Kr)

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.