Answer:
think the first one is Na small 2 CL small 3
second one is NaHCO small 4
I would go with C. SDS and warning signs
Magnesium :
<span>[Ne] 3s²</span>
Answer A
hope this helps!
Atomic weights are weighted averages calculated by multiplying the relative abundance of each isotope by its atomic mass and then summing up all the products.
