Question:
The period number and group number of platinum in the long form of periodic table are respectively:
The period number and group number of platinum in the long form of periodic table are respectively:
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For d-block elements: group number = (d electrons + s electrons).
Updated On: Jun 19, 2026
- 5, 11
- 5, 10
- 6, 11
- 6, 10
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The Correct Option is D
Solution and Explanation
Step 1: Identify atomic configuration of Pt.
Platinum (Pt, Z = 78): \[ [Xe]\,4f^{14}5d^9 6s^1 \]
Step 2: Determine period number.
Highest principal quantum number is 6: \[ \text{Period} = 6 \]
Step 3: Determine group number.
d-block element, group = (d + s electrons): \[ 9 + 1 = 10 \]
Step 4: Periodic table rule.
Transition metals group number depends on total valence electrons in d and s orbitals.
Step 5: Verify classification.
Pt belongs to group 10 transition metals.
Step 6: Final conclusion.
Thus, period 6 and group 10.
Final Answer: \[ \boxed{6, 10} \]
Platinum (Pt, Z = 78): \[ [Xe]\,4f^{14}5d^9 6s^1 \]
Step 2: Determine period number.
Highest principal quantum number is 6: \[ \text{Period} = 6 \]
Step 3: Determine group number.
d-block element, group = (d + s electrons): \[ 9 + 1 = 10 \]
Step 4: Periodic table rule.
Transition metals group number depends on total valence electrons in d and s orbitals.
Step 5: Verify classification.
Pt belongs to group 10 transition metals.
Step 6: Final conclusion.
Thus, period 6 and group 10.
Final Answer: \[ \boxed{6, 10} \]
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