There are seven periods (numbered from \(1\) to \(7\)).The zero group contains elements belonging to inert (noble) gases, and the elements present have zero valencies. Group VIII consists of \(9\) elements which are arranged in triads. The elements that are placed on the left-hand side of each group constitute subgroup A, while those on the right-hand side form subgroup B. The elements belonging to the first \(7\) groups have been divided into subgroups designated as A and B based on similarity in properties. There are \(9\) groups indicated by Roman numbers as I, II, III, IV, V, VI, VII, VIII, and zero.In this table, the elements are arranged in vertical columns called groups and horizontal rows known as periods.The main characteristics of Mendeleev’s Periodic Table are: This table is called the modified form of Mendeleev’s periodic table. With the discovery of more and more elements, Mendeleev’s periodic table was revised, and the new elements were included in the appropriate places. In several places, he ignored the order of atomic masses to group together the elements having similar properties. Mendeleev placed the elements having similar properties in the same group in the increasing order of atomic masses. Elements with similar physical and chemical properties are arranged together in the increasing atomic mass.Atomic masses of elements determine their physical and chemical properties.Include the alkali metals, alkaline earth metals, transition metals, halogens, and inert/noble gases.The following two inferences are drawn from his periodic law: Inert gases meaning they are unreactive with other elements!Ģ2 Output: Conclusion: Write 5 sentences describing the properties of the groups of the periodic table. 8 valence electrons they have a full outer orbital, this is why they don’t react 3. Gain Electronsġ9 What are the properties of the Noble Gases?Ģ0 What are the properties of the Noble Gases? Group 13 has 3 valence electrons, Group 14 has 4, Group 15 has 5, etc.ġ6 Groups Boron Group Carbon Group Oxygen Group Nitrogen Groupġ7 What are the properties of the Halogens?ġ8 What are the properties of the Halogens? Zinc and copper are both transition metals!ġ5 What are the properties of the Group 13-16?īoron, Carbon, Nitrogen,
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