Tổng số hạt p, n, e trong nguyên tử của nguyên tố X nhóm VII A là 28. Tính số hạt n của X.

thats a little if u want the answer just look it up on google thats what i do haha : )

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )