Which of the Following Is Correct for the Fourth Period

question 3

Multiple Choice

Which of the following is correct for the fourth period element in Group 3A/13?
Z Chemical symbol Atomic mass

• A)31 Ga 69.72
• B)69.72 Ga 31
• C)14 Si 28.09
• D)28.09 Si 14
• E)21 Sc 44.96

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