Which element has the largest atomic radii in the 3rd period of the periodic table?

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

level 4 to level 2 : ))

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.