Silicon's Atomic Number Is 14;in the Periodic Table It Is

question 18

Multiple Choice

Silicon's atomic number is 14;in the periodic table it is directly beneath carbon.Silicon is abundant in the Earth's crust,yet,unlike C,N,O,and H,silicon is not a common element in organisms.What about the atomic structure of silicon probably accounts for this?

• A)The nucleus of silicon is probably too small to form long chains of Si-Si molecules (analogous to long chains of carbon molecules).
• B)The nucleus of silicon is probably too big to form long chains of Si-Si molecules (analogous to long chains of carbon molecules).
• C)Silicon only has three valence electrons,so it can make fewer covalent bonds than carbon.
• D)Silicon is too electronegative to be an element common in living organisms.

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Definitions:

Working Capital

A measure of a firm's ability to fulfill short-term financial obligations, underscored by its liquid assets minus its due debts.

Salvage Value

The appraised remaining value of an asset at the point of its life end.

Pretax Return

The earnings of a company before taxes have been deducted.

Working Capital

The gap between what a business owns in current assets and owes in current liabilities, showing the available liquidity to cover daily operational costs.