Answer:
mass is the amount of substance contained in matter while volume is the space occupied by matter
in other words , mass talks about how heavy a body is while volume deals with the space covered by a 3- dimensional body. note : A 2- dimensional body can't occupy volume
Answer:
All the elements in one group have the same number of valence electrons. ... Since elements in a group have the same number of valence electrons, they behave similarly in chemistry. An example would be the alkali metals (excepting hydrogen. Hydrogen is in this group only because it has one valence electron.
Explanation:
A) mass is always conserved in a reaction