Which atoms are indicated by the given configurations ? (a) [He] 2s¹ (b) [Ne] 3s² 3p³ (c) [Ar] 4s² 3d¹.
Answers
Answer:1=lithium. 2=phosphorus. 3=scandium
Explanation:
Answer:
(a) Lithium (b) phosphorus (c) scandium
Explanation:
(a) The atoms with electronic configurations [He] 2s¹ will be lithium. As the helium has total number of electrons two and there is one extra electron in s orbital. so total number of electrons for given configuration is 3, which is the atomic number of lithium.
(b) The atoms with electronic configurations [Ne] 3s² will be phosphorus. As the neon has a total number of electrons 10 and there are 5 extra electrons, 2 in s orbital and 3 in the p orbital. so the total number of electrons for the given configuration is 15, which is the atomic number of phosphorus.
(c) The atoms with electronic configurations [Ar] 4s² 3d¹ will be scandium. As the argon has the total number of electrons 18 and there are 3 extra electrons, 2 in s orbital and 1 in d orbital. so the total number of electrons for the given configuration is 21, which is the atomic number of scandium.