How many elements are present in The forth period of p block
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1
Answer:
it contains 18 elements
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0
Answer:
18 elements
Explanation:
The fourth period contains 18 elements, beginning with potassium and ending with krypton. As a rule, period 4 elements fill their 4s shells first, then their 3d and 4p shells, in that order; however, there are exceptions, such as chromium.
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