Answer
Verified
375.9k+ 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
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
Which are the Top 10 Largest Countries of the World?
How do you graph the function fx 4x class 9 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE