What is the Lewis structure for SiH4?
What is the Lewis structure for SiH4?
Let’s do the Lewis structure for SiH4. On the periodic table, Silicon, group 4, 4 valence electrons; Hydrogen, group 1, 1 valence electron, but we have four of them. So 4 plus 4: 8 total valence electrons.
Does SiH4 follow the octet rule?
Answer Expert Verified The statement is true. The octet rule refers to the general rule of thumb wherein atoms of main-group elements tend to bond with other atoms in such a way that each atom possesses eight electrons (octet) in their valence shell. This is given by the silicon atom which has 4 valence electrons.
What is triad law?
Dobereiner’s law of triads: When elements are arranged in order of increasing atomic masses,groups of three elements(triads), having similar chemical properties are obtained. The atomic mass of the middle elements of the triad being equal to the arithmetic mean of the atomic masses of the other two elements.
Which is not a dobereiner Triad?
So if there are any of the two elements in the group that has a very low and very high atomic mass number, then these elements do not exhibit Doberiner traits. Li (7) , Na (23) , K (39) = Li + K = 7 + 39 = 46 / 2 = 23 = Na (middle element) so this is a Dobereiner traits.
Is Fe Co Ni are dobereiner Triad?
The elements lithium, sodium and potassium form a dobereiner’s triad. Considering the question as the atomic weight of the middle element is not the same as an average of the weight of the other two elements. Therefore, Fe, Co, Ni is not a Doberiner triad.
Is s se te a triad?
S, Se, Te are the elements of a triad.
Which of the following is not a triad?
Triad can be only when the middle element is having mean atomic weight of other two elements , which B,Al,Ga does not have such triad.
Which of the following is an example of dobereiner’s triad?
1 Answer. The elements lithium, sodium and potassium form a Dobereiner’s triad. Lithium is the first element of this triad, sodium is the middle element whereas potassium is the third element of the triad.
Is Cu Ag Au a triad?
Hint: According to Dobereiner’s triads, atomic weight of the middle element is equal to the average of the preceding and the next element. which is not close to the actual mass and hence it does not follow Dobereiner’s triad rule. Cu, Ag, Au. These three elements are copper, silver and gold.
Which obeys the law of triads?
By the definition of law, the atomic weight of bromine, must be approximately equal to the average of atomic masses of chlorine and iodine. This value is approximately equal to atomic mass of bromine which has the value 79.9. Hence these groups obey the law of triads.
Which triads set doesn’t fit for dobereiner’s law of triads?
Li, Na, K.
Is P as SB a dobereiner Triad?
Using his triad rule, we can determine the atomic weight of arsenic (As) when the atomic weight of phosphorus(P) and antimony (Sb) is given, 31 and 120 respectively. Their average will result in the atomic weight of arsenic as per Dobereiner’s triad rule. Hence, the correct option is (B).
Which element is largest in size?
francium
What is the meaning of Triad?
1 : a union or group of three : trinity. 2 : a chord of three tones consisting of a root with its third and fifth and constituting the harmonic basis of tonal music.
How many elements were at the time of dobereiner?
53 elements
What was wrong with the law of octaves?
After Calcium,every eighth element did not possess properties similar to that of the first. The elements that were discovered later could not be fitted into the law of octaves. After the discovery of Nobel gases,it became difficult to fit them in Newland’s periodic table.