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Rudik [331]
3 years ago
6

Electron groups consist of which of the following? A.Bonded pairs of electrons B.Lone-pair electrons C.Any atom that's an ion D.

Three or more unshared electrons
Physics
1 answer:
umka2103 [35]3 years ago
3 0

Answer:

correct answer is option A and B are correct.(an electron groups consist of bonded pairs of electrons and Lone-pair electrons )

Explanation:

An electron group is a group of electrons. An electron groups consist of bonded pairs of electrons and Lone-pair electrons . Electron can have single bond, double bond or they can have triple bond.

Therefore both option A and B are correct.

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Answer:

M₀ = 5i - 4j - k

Explanation:

Using the cross product method, the moment vector(M₀) of a force (F) is about a given point is equal to cross product of the vector A from the point (r) to anywhere on the line of action of the force itself. i.e

M₀ = r x F

From the question,

r = i + j + k

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Therefore,

M₀ = (i + j + k) x (1i + 0j +  5k)

M₀ = \left[\begin{array}{ccc}i&j&k\\1&1&1\\1&0&5\end{array}\right]

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M₀ = 5i - 4j - k

Therefore, the moment about the origin O of the force F is

M₀ = 5i - 4j - k

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