The only way an object's speed or direction of motion can be changed is if a(n) force acts on it. A.
frictional
B.
unbalanced
C.
balanced
D.
electrical

unbalanced

Explanation:

got in right on study islands

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.