In the graph you can observe the trends of boiling points for various families of compounds. For the red, blue and green trends, devise an explanation for the significant decrease in boiling points from periods 2 to 3.
A)
B)
The intramolecular attractions between Hand the other element are much
stronger in period 3 as opposed to period 2.
The compounds from period 2 exhibit a very strong dipole force known as
hydrogen bonding whereas the compounds in period 3 exhibit weaker
dipole forces
The hydrogen bonding in period 2 is lighter in strength than the
compounds in period 3, respectively. These results in a tighter bond
requiring more thermal energy to break
The intermolecular forces between compounds in period 2 are stronger
than in period 3. This results in less thermal energy being required to break
the bonds in period 2 compounds.
D)

sry but any answer choices

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

hcl + naoh → h2o + nacl

explanation:

hcl + naoh → h2o + nacl   is the reaction that is correctly balanced.

however, pcl3 + h2 → ph3 +3hcl, 2ca+ 3cl2 → cacl3, and c5h12 + 5o2 → 5co2 + 6h2o are not correctly balanced.