<em><u>ANSWER</u></em>
shell or the energy level
The first pesticides relied on natural chemicals, such as those taken from chrysanthemum flowers is true
Answer:
The elements in group 13 and group 15 form a cation with a -3 charge each.
MgCl2
Mg=24
Cl=35.5×2 = 71
rmm= 71+24=95g
1 mole = molar mass
1 mole = 95g
1g = 1/95 moles
345g= 1/95 × 345
3.6 moles
