The question is in complete, the complete question is:
Which element has an outer electron configuration of s
2
p4
?
(A) Ca (B) Cr (C) Ge (D) Se
Answer:
(D) Se
Explanation:
The outer electronic configuration of an atom reflects the group to which it belongs in the periodic table. Each group has its unique outermost electron configuration and number of electrons found in the outermost shell of the atoms of elements in the group.
s
2
p4 is the unique outermost electron configuration of group 16 elements. Group 16 elements have six electrons in their outermost shell. If we consider the options, only Se is a member of group 16. Hence it is only Se that has the outermost electron configuration s
2
p4
.
The formula that represent a covalent compound would be H2O2
Fossil fuels are still being widely used because of the fact that the demand for alternative fuels cannot be met by current manufacturers.
Answer: Almost all reactions of hydrochloric acid and aluminum ''or its compounds'' result in the formation of aluminum chloride (AlCl₃). The salt dissolves well in organic solvents (nitrobenzene, dichloroethane, acetone) and water.
Explanation: NaCl is the formula of salt!
Answer:
D
Explanation:
NO and O2 are both colourless gas. and its product is brown. thus when a brown gas is produced, you can say that NO and O2 reacted to form NO2
