Which atom would tend to gain one valence from another atom in orther to become stable

Fluorine and sodium

Explanation:

Fluorine has 2,7 remaining one valance electron to be balance and sodium has 2,9 in which it will lose one too for both of them to be balanced so fluorine atom will receive 1 valence electron from sodium atom so they can both be balanced

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

their crystal patterns have been disrupted by stress