Metal (Ca) Polyatomic anion (CO3). You do not need to use the roman numeral because Ca is in group 1. The answer is metal + polyatomic or Calcium Carbonate
The answer is (2).
Both the proton and the neutron have masses around 1amu.
<span>All are used in relief printing except a gouge "D". A gouge is a concave bladed chisel used in sculpting. Lead can be the medium that the relief is in. Paper is the material that the final print is on. A mat knife is the blade used to cut the paper to the appropriate size.</span>
HOPBr₂ = <span>dibromophosphinous acid
hope this helps!
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