An atom is the basic unit of a/an___________(element/compound).
Atom: Atoms are referred to as “the basic building blocks of any matter”.
Thus, an atom is the basic unit of an element.
Anelement with molar mass 2.7× 10-2kg mol-1forms a cubic unit cell with edge length 405 pm. If its density is2.7 × 103 kg m−3,what is the nature of the cubic unit cell?
Use the periodic tableto answer the following questions.
(a) Identify anelement with five electrons in the outer subshell.
(b) Identify anelement that would tend to lose two electrons.
(c) Identify anelement that would tend to gain two electrons.
(d) Identify the group having metal, non-metal, liquid as well asgas at the room temperature.