To have a complete outermost shell, the sodium atom would: * a-gain 7 electrons forming sodium atom
b-lose an electron forming sodium atom
c-gain 7 electrons forming sodium ion
d-lose an electron forming sodium ion

Sodium (Na) is an alkali metal which is very reactive, having only one valence electron.

in order to attain stability or to complete octet, he donates or loses its outermost electron.

after losing an electron Sodium forms a Cation ( positive ion ) due to more protons in atom as compared to electrons.

hence; the correct option will be...

D -lose an electron forming sodium ion

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 : )