Which substances have one neutron? select all that apply.
a. h-1
b. h-2
c. h-3
d. he-2
e. he-3
f. he-4
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Option B and E

Explanation: No of neutrons (n) = Mass number - Atomic number= A-Z

A. n=1-1=0

B. n=2-1=1

C. n= 3-1=2

D. n= 2-2=0

E. n=3-2=1

F. n=4-2=2

Hence options B and E are correct

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explanation:

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

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