What is the position of an element in the periodic table if its electron configuration is 1sæ 2sæ 2pò 3sæ 3p¢?

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse