The element with electronic configuration 2, 8, 6 is _____________.
An element A atomic number 7 mass number 14
B electronic configuration 2, 8, 8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E electronic configuration 2, 8, 8, 1
State (i) valency of each element (ii) which one is a metal (iii) which is a non-metal (iv) which is an inert gas.
The electronic configurations of atoms of three elements A. B and C are (2, 8, 1), (2, 8, 6) and (2, 8, 18, 7) respectively. Which option classifies the elements A. B and C as metals and non-metals correctly?
Question 30 The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?
The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2 is a/an?