Answer:
Look at the explanation!
Explanation:
The Mercator map projection is a cylindrical map projection that was presented by Gerardus Mercator in 1569. Gerardus Mercator was a Flemish geographer and cartographer. It became the standard map projection for navigation because of it's cool one of a kind property of "representing any course of constant bearing as a straight segment."
Collagen......
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D is the answer (Aa and aa ) i hope this helps
Answer:
element Y and Z
Explanation:
Having on valence electron indicates that these elements are on the same column/group of the periodic table. Both these elements will bond with a -1 charge.