Chemistry
Grade-9
Easy
Question
A & B are two elements having similar properties which obey the law of octaves. How many elements are there in between A and B?
- 6
- 7
- 8
- 5
Hint:
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.
The correct answer is: 6
The law of octave is stated as: if we organized the chemical elements based on increasing atomic weight, elements which have similar physical and chemical properties are seen after the interval of seven elements or the properties of the first element are similar to the eight-element.
Therefore, if A is the first element and it goes up to element B which is the eight-element, then there are a total of 6 elements in between elements A and B.
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