What is the first quantum number of a 2s2 electron in phosphorus, 1s22s22p 3s23p3?
O A. n = 2
O B. n = 3
0 C. n = 0
D. n = 1
SUBMIT

im not exactly sure but i think its b!

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l