Which is the electron configuration for lithium?
o 15²
o 253
1822s1
O 151252

Explanation:

the atomic number of lithium is 3 thats why the electronic configuration of lithium is 1s2,2s1

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.