Con ayuda de la tabla periodica, calcula la masa en gramos de 1 mol de : #fluor:F :19/MOL
#cobre:
#hiERRO
#fosforO
#calcio
alquien q me digaa porfiss

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 : )

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8