Answer:
b
Step-by-step explanation:
Arsenic exists in nature in three allotropic forms which are black, yellow and grey in which a silver- grey are brittle crystalline solid and the stable forms. Arsenic oxidises rapidly when it is kept in contact with air and forms a white cloud of arsenic trioxide at high temperature.
Arsenic, like nitrogen, has five electrons in its valence shell. The position of arsenic is under the phosphorus which itself is under nitrogen, thus these elements are known as isoelectronic and they have similar properties.
Lewis structures are also termed as Lewis dot formulas are the diagrams which represent the bonding between the atoms present in the molecules also with lone pairs of electrons which may exist in the molecules.
Lewis structures are very useful for the summarization of the information about bonding and may be considered as “electron bookkeeping”. In Lewis dot structures, the electrons are represented by dots. And a pair of dots between symbols for atoms shows a bond.