Answer:
A horizontal line on a speed-time graph represents a constant speed. A sloping line on a speed-time graph represents an acceleration. The sloping line shows that the speed of the object is changing. The object is either speeding up or slowing down.
I'd say the correct answer is: Noodles rising and falling apart in boiling water.
Answer is valence electron, they all have total of 2 valence electron.
remember group number = valence electron
It is made of only nonmetals is not true because there are other elements that form it.
