Periodic Table

Periodic Table

​3.1 Classification of Element

• ​Group1: Alkaline Metal

• ​Group2: Alkaline Earth Metal

• ​Group3-15: Transition Metal

• Group16: Chalogen

• ​Group17: Halogen

• ​Group18: Noble/Inert gas

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​ *same group=same valence electron

​ *same period=same number of principle quantum number, n

​Group & Period

​Block

​Based on valence electronic configuration

• ​Block s: ns¹ to ns²

• ​Block p: ns²np¹ to ns²np⁶

• ​Block d: ns²(n-1)d¹ to ns²(n-1)d¹⁰

• ​Block f: 4f and 5f

​Determine group and period

​Group

​Based on valence electron

• ​Group 1-2(s): group number=number of valence electron

• ​​Group 13-18(p): group number=number of valence electron+10

• ​Group 3-12(d): group number=total number of valence electron of ns²(n-1)d¹ to ns²(n-1)d¹⁰

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Period

​Based on the number of highest principle quantum number, n

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Example

​1s²2s²2p⁶3s²3p²

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Multiple Choice

Which block should an element be placed if it electronic configuration of 1s²2s²2p⁶3s²3p⁶3d⁴4s²

• block d

• block s

• block p

• block f

Multiple Choice

What is the name for group 2

• Earth Alkaline Metal

• Alkaline Metal

• Alkaline Earth Metal

Multiple Choice

Which block does Helium located?

[proton number of He=2]

• block s

• block p

Multiple Select

Classify the element into appropriate group, period or block

X=​1s²2s²2p⁶3s²3p⁶4s²3d⁵

• block s

• group 7

• block 17

• block d

• period 3

Multiple Choice

Which of the following is false?

• Y and Z are halogen

• R and X are in same group

• X and T have same valence electron

• S and W are located in same period