Half life is determined using the equation expressed as:
A = Ao e^-kt
First, we need to find for the value k.
A = .67Ao = Ao e<span>^-k(33 min)
k = 0.0121
The half-life is then calculated as follows:
</span>A = .5Ao = Ao e<span>^-0.0121(t)
</span><span>t = 57.28 min
</span>
Answer:
- <u><em>Both fitth electons are located on a 2p orbital.</em></u>
Explanation:
The electrons fill the orbitals of the atom in increasing order of energy level. Using Aufbau's mnemonic rule you can find the order of filling:
- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ . . .
Thus, the firs two electrons are located on the 1s orbital, the next two electrons are on the 2s orbital, and the <em>the fifth, electron of </em>both <em>boron and carbon is located </em>on a 2p orbital.