Arrange the following molecules in order of increasing bond angles (smallest first): (a) xef4.(b) ch4.(c) h2o.(d) beh2. enter four letters in order: (e. g. abcd, dcba, acbd, etc.)"

ACBD

Explanation:

The bond angles of the given molecules will be:

Square planar shape

Bond angle = 90°

=

Tetrahedral

Bong angle = 109.5°

=

Bent shape

Bong angle = 104.5°

=

Linear

Bong angle = 180°

Thus the order will be:

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the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

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