Answer:
second one (b)
Step-by-step explanation:
The nickel (at the bottom) is increasing at a steady pace. We know this because the line is going in a linear motion (meaning in a straight line). And it is increasing by a steady number (the gradient is 5 grams).
Its C
It is 6 because there are 6 dots on the outer circle and those are the valence electrons. Also I just did it on Edge. Hope this helps.
14r – 8r=126
6r=126
R=21
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4+6+5=15
15-1=14
2/14
1/7
So do you already have the answer? Also 1/20 looks right.
