ANSWER THE FOLLOWING QUESTIONS:-
Define Mendeleev's periodic law. What is Newland's law of octaves? Define : (i) Group, (ii) Period. Name four defects of Mendeleev’s periodic table. State modern periodic law. What are normal elements? . What is the cause of periodicity? What are the merits of the long form of the periodic table? What are the two major defects of long form of the periodic table?
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Answer:
Mendeleev's periodic law states that " The properties are a periodc function of their atomic mass." This means that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.
The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.
(i) The vertical columns in a periodic table are called groups. (ii) The horizontal rows of elements in
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Answer:
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.
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