Answer
Verified
349.2k+ views
Hint: Dobereiner’s triads are the group of elements with similar properties. They were discovered by Dobereiner. He proposed that we can form groups of three elements in which all the elements share similar physical and chemical properties.
Complete answer:
According to Dobereiner’s law of triads, the arithmetic mean of the atomic masses of the first element and third element in the triad will be approximately equal to the atomic mass of the middle element in that triad. Dobereiner’s law of triads also has limitations. The discovery of new elements made this model obsolete. The newly discovered elements could not be fitted into the triads. Only five Dobereiner’s triads were identified. Many elements could not be fitted into any of the triads. The arithmetic mean of the masses of chromium and beryllium is not equal to the atomic mass of magnesium. So, this group is not a Dobereiner’s triad.
Therefore, option C is correct.
Note:
Triad is a term used in music. It is a chord which is made up of three tones called chord factors. A chord is the combination of notes derived from a scale combined to bring out harmony of that scale. Triad is the most basic form of chords. This system of diatonic triads is considered to be the basis of the tonal harmony in music. The law of triads failed because all the known elements could not be arranged in the form of triads.
Complete answer:
According to Dobereiner’s law of triads, the arithmetic mean of the atomic masses of the first element and third element in the triad will be approximately equal to the atomic mass of the middle element in that triad. Dobereiner’s law of triads also has limitations. The discovery of new elements made this model obsolete. The newly discovered elements could not be fitted into the triads. Only five Dobereiner’s triads were identified. Many elements could not be fitted into any of the triads. The arithmetic mean of the masses of chromium and beryllium is not equal to the atomic mass of magnesium. So, this group is not a Dobereiner’s triad.
Therefore, option C is correct.
Note:
Triad is a term used in music. It is a chord which is made up of three tones called chord factors. A chord is the combination of notes derived from a scale combined to bring out harmony of that scale. Triad is the most basic form of chords. This system of diatonic triads is considered to be the basis of the tonal harmony in music. The law of triads failed because all the known elements could not be arranged in the form of triads.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Why Are Noble Gases NonReactive class 11 chemistry CBSE
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
At which age domestication of animals started A Neolithic class 11 social science CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Write a letter to the principal requesting him to grant class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE