Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2<span>) electrons.</span>
Answer:
Joining a club and getting a hobby
Explanation:
Join a club if you want to meet people, and when they choose a hobby it should be more than just gardening, because gardening sucks in the long term and it doesn't fill that gap. I know because my grandma did it and she is still sad.
Answer:
-18.1 cm and upright
Explanation:
u = Object distance = 25 cm
v = Image distance = -10.5 cm
f = Focal length
Lens Equation
Focal length of the lens is -18.1 cm
Magnification
Since magnification is positive the image upright