The diagram shows part of the Periodic Table.
H
|
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Li
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|
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B
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C
|
N
|
O
|
F
|
Ne
|
Na
|
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Al
|
Si
|
P
|
S
|
Cl
|
Ar
|
K
|
Ca
|
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Cu
|
Zn
|
|
|
|
|
Br
|
Kr
|
|
|
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Answer the following questions using only the elements in the diagram.
Each element may be used once, more than once or not at all.
Which element
has a smaller proton number than lithium,