Jual Volume to now
Select "Same Volume" from the Blocks menu.
Place all the blocks in the water. Which observations
are correct? Check all that apply.
The blue and yellow blocks are denser than water.
The least dense block is the green block.
The green block is denser than the red block.
The blue and yellow, blocks have the same mass.
O The red block is the least dense block.

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.