Before we start evaluating proposed solutions, let's examine the equation for just a second:
-4f = 30f
Divide each side of the equation by ' f ' :
-4 = 30
If that just doesn't look right to you, you're on to a valuable insight. You may be
tempted to say that the equation can't have any solution, because -4 can't be equal
to 30. But there is actually one solution . . . [ f = 0 ].
If [ f = 0 ], then by gosh, -4f is actually equal to 30f .
And no, ' f ' can't be -10 .
It is (4f + 1)/10.
f = -2
4f
3f - 2 = 4f + 5 You are looking for an unknown number, f. In the end, you want to know that f equals a specific number; the number on one side of the equation and f on the other. So first you want to get it in that format: -2 = 5 + 4f - 3f -2 - 5 = 4f - 3f Now solve: -7 = f You can see that f equals -7. This is what you're looking for.
3
4F, when interpreted as a hexadecimal number, is equal to 79 in decimal. This is calculated by taking 4 times 16 (which equals 64) and adding 15 (the decimal equivalent of F), resulting in 79. Therefore, as an integer, 4F is 79.
When you have 3f plus f plus 4f, you are adding together like terms. In this case, the variable "f" is the same, so you can add the coefficients together. 3f + f is 4f, and when you add 4f to that, you get 8f. Therefore, 3f + f + 4f equals 8f.
14
14
2s: 2 electrons 5p: 6 4f: 14 3d: 10 4d: 10
3 nodes in 4f
The possible values for a 4f sublevel are 14. This means there can be a maximum of 14 electrons in a 4f sublevel.