Electronic configuration is given by

- 1s orbital is filled
- 2s orbital is unfilled
So
Answer:
The temperature should be 885K.
Explanation:
In this case we use Charles's Law according to which the volume and temperature of a certain amount of gas are related, keeping the pressure constant. We convert the unit of temperature from Celsius to Kelvin: 0 = 273K -> 40 ° C = 40 + 273 = 313K
V1 / T1 = V2 / T2
2,3L/313K= 6,5L/T2
T2=6,5L/(2,3L/313K)=884, 56K
We have to round off each measurement to the number of significant figures.
The correct answers are: 265.9, 0.00045 and 65 respectively.
265.991 when expressed in 4 significant figure it rounds off as 265.9 because 265.9 represents the value 265.991.
0.0004513 when expressed in 2 significant figure it rounds off as 0.00045 because zero before and after decimal are not significant.
6593 when expressed in 2 significant figure it rounds off as 65.