Question

16. Which of the following properties of the elements remain unchanged across

#period
A lonivation energy
C Electro negativity
13. Number of shells
D. Nuclear charge​

Answer 1

Number of shells

Step-by-step explanation:

Across the period on the periodic table, the number of shells remains the same. There is no variation or trend for the number of shells on a period.

• The number of shell is the energy level corresponding to an atom.
• As we go from period to period, the energy level increases by 1.
• The period number corresponds to the number of shells.
• Elements in period 4 will have 4 shells.
• There is no variation of any sort in the number of shell across a period.