Answer:
1, their atoms have the same number of valence electron. because valence electron determine the group of elements.
1.7 x 10^2 N
or 166 N
First you find the vertical component of the weight, which is 9.8*40, (g*m), which is 392 N. You then find the angle between that and the slope, which is 90-25, which is 65. You then multiply the vertical weight by cos(65), to find the component of that that is parallel to the slope. You get 165.666 N
Answer:Because it likes to repel and attract opposites
The list of choices you provided with your question
is utterly devoid of any such examples.
