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The Arrangement of Elements in the Modern Periodic Table of Elements

 
4.2  The Arrangement of Elements in the Modern Periodic Table of Elements
 
Modern Periodic Table
  • Merupakan satu bentuk pengelasan unsur secara sistematik mengikut tertib menaik nombor proton dari kiri ke kanan dan dari atas ke bawah.
 
The Arrangement of Elements in the Periodic Table
  • The elements are arranged in order of increasing proton number from left to right and from top to bottom.
  • The arrangement of elements is discussed from the aspects of groups, periods, proton number and electron arrangement.
  • The vertical columns in the Periodic Table of Elements are called Groups.
  • There are 18 groups of elements in the Periodic Table of Elements.

This image contains three columns of information about different groups of elements in the periodic table. 1. The first column is titled ‘1’ and describes Group 1 elements. It lists the elements (Li, Na, K, Rb, Cs, Fr) and states that they are called alkali metals. 2. The second column is titled ‘2’ and describes Group 2 elements. It lists the elements (Be, Mg, Ca, Sr, Ba, Ra) and states that they are known as alkaline earth metals. 3. The third column is titled ‘3’ and describes Group 17 elements. It lists the elements (F, Cl, Br, I, At) and states that they are known as halogens.

  • The number of valence electrons will determine the position of the group of an element
  • The horizontal rows in the Periodic Table of Elements are called Periods.
  • There are seven periods in the Periodic Table of Elements.
  • The number of shells filled with electrons will determine the position of an element in a period.
 
Position of the Group of An Element
With One or Two Valence Electron With Three to Eight Valence Electrons
Group = Number of valence electrons Group = Number of valence electrons + 10
 
Relationship between the Proton Number and the Position of Elements in the Periodic Table of Elements
Element Proton Number Electron Arrangement Valence Electron Group Number of Shells Filled with Electrons Period
Litium, Li 3 2.1 1 1 2 2
Calsium, Ca 20 2.8.8.2 2 2 4 4
Aluminium, Al 13 2.8.3 3 3 + 10 = 13 3 3
Silicon, Si 14 2.8.4 4 4 + 10 = 14 3 3
Nitrogen, N 7 2.5 5 5 + 10 = 15 2 2
Oxsigen, O 8 2.6 6 6 + 10 = 16 2 2
Bromin, Br 35 2.8.18.7 7 7 + 10 = 17 4 4
Krypton, Kr 36 2.8.18.8 8 8 + 10 = 18 4 4
 

 

 


 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.

The Arrangement of Elements in the Modern Periodic Table of Elements

 
4.2  The Arrangement of Elements in the Modern Periodic Table of Elements
 
Modern Periodic Table
  • Merupakan satu bentuk pengelasan unsur secara sistematik mengikut tertib menaik nombor proton dari kiri ke kanan dan dari atas ke bawah.
 
The Arrangement of Elements in the Periodic Table
  • The elements are arranged in order of increasing proton number from left to right and from top to bottom.
  • The arrangement of elements is discussed from the aspects of groups, periods, proton number and electron arrangement.
  • The vertical columns in the Periodic Table of Elements are called Groups.
  • There are 18 groups of elements in the Periodic Table of Elements.

This image contains three columns of information about different groups of elements in the periodic table. 1. The first column is titled ‘1’ and describes Group 1 elements. It lists the elements (Li, Na, K, Rb, Cs, Fr) and states that they are called alkali metals. 2. The second column is titled ‘2’ and describes Group 2 elements. It lists the elements (Be, Mg, Ca, Sr, Ba, Ra) and states that they are known as alkaline earth metals. 3. The third column is titled ‘3’ and describes Group 17 elements. It lists the elements (F, Cl, Br, I, At) and states that they are known as halogens.

  • The number of valence electrons will determine the position of the group of an element
  • The horizontal rows in the Periodic Table of Elements are called Periods.
  • There are seven periods in the Periodic Table of Elements.
  • The number of shells filled with electrons will determine the position of an element in a period.
 
Position of the Group of An Element
With One or Two Valence Electron With Three to Eight Valence Electrons
Group = Number of valence electrons Group = Number of valence electrons + 10
 
Relationship between the Proton Number and the Position of Elements in the Periodic Table of Elements
Element Proton Number Electron Arrangement Valence Electron Group Number of Shells Filled with Electrons Period
Litium, Li 3 2.1 1 1 2 2
Calsium, Ca 20 2.8.8.2 2 2 4 4
Aluminium, Al 13 2.8.3 3 3 + 10 = 13 3 3
Silicon, Si 14 2.8.4 4 4 + 10 = 14 3 3
Nitrogen, N 7 2.5 5 5 + 10 = 15 2 2
Oxsigen, O 8 2.6 6 6 + 10 = 16 2 2
Bromin, Br 35 2.8.18.7 7 7 + 10 = 17 4 4
Krypton, Kr 36 2.8.18.8 8 8 + 10 = 18 4 4
 

 

 


 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.
Chapter : Periodic Table of Elements
Topic : Generalise the relationship between proton number and position of elements in Periodic Table of Elements
Form 4 Chemistry
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