Does the shape of a molecule have any effect on its physical properties? Support your answer with an example from daily life and explain how the shape of the molecule affects its physical properties.
Complete the electronic configuration of the following:
- Fluorine (Atomic Number: 9): 1s2 2s2 __
- Potassium (Atomic Number: 19): 1s2 2s2 2p6 ___ ____ ___
Which of the following elements have an equal number of valence electrons?
- Na (Atomic Number: 11)
- O (Atomic Number: 8)
- K (Atomic Number: 19)
Write the number of valence electrons and valency of aluminium (Atomic Number: 13).
The electronic configuration of the atoms of three elements X, Y, and Z is given below. Which of these elements are metals?
a: 1s2 2s1
b: 1s2 2s2 2p5
c: 1s2 2s2 2p6 3s2