Question

Which diagram represents an element that is likely to form covalent bonds? A purple circle with 2 concentric circles around it. The inner circle has 2 small green spheres. The outer circle has 1 small green sphere. A purple circle with 3 concentric circles around it. The inner circle has 2 small green spheres. The middle circle has 8 small green spheres. The outer circle has 5 small green spheres. A purple circle with 3 concentric circles around it. The inner circle has 2 small green spheres. The middle circle has 8 small green spheres. The outer circle has 8 small green spheres. A purple circle with 4 concentric circles around it. The inner circle has 2 small green spheres. The second circle has 8 small green spheres. The third circle has 8 small green spheres. The fourth circle has 2 small green spheres.

Answer 1

ANSWER

Chord AB of the outer circle cuts the inner circle at C and D.

To prove: AC = BD

Construction: Draw OM = AB

Proof : Since OM⊥AB (by construction)

OM also ⊥ CD (ACDB is a line)

In the outer circle

AM = BM (1) (∵ OM bisects the chord AB)

In the inner circle CM = DM (2) (∵ OM bisects the chord CD)

From (1) and (2), we get

AM - CM = BM - DM

AC = BD

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