Question

For the halogen element which would be in the eight period (as yet undiscovered element):
a. Predict the atomic number.
b. Write the noble gas ground-state configuration (assume that the naming letter for the sublevels
becomes alphabetical after the f sublevel).
c. Predict a value for the atomic radius and ionic radius.
d. Would this material exist as a solid, liquid, or gas at room temperature? Explain your reasoning.

Answer 1

For a halogen element in the eight period,

a. The atomic number = 167

b. noble gas ground state configuration = [Uuo]8s^2 7d^10 6f^14 9s^1 5g^18 8p^5

c. Predicted atomic radius = 170.57 pm

ionic radius = 440.8 pm

d. This material undoubtely would only exist as a solid. As the element gets hevaier, it stays on;y in solid state. since this element would be having greater mass than Iodine which again is a solid, thus too would stay as solid at room temperature.