(a) Two elements whose names start with the letter 'C'.
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5
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Explanation:
◆In these two-letter symbols, the first letter is always capitalized and the second is always lowercased. Eleven elements have names (and symbols) beginning with the letter C. One of these, carbon, has a one-letter symbol, C.
Symbol Element
C carbon
Ce cerium
Cs cesium
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2
Answer:
1 carbon
2 copper
3 calcium
4 chlorine
5 cerium
6 cuprum
7 chromium
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