Write the derived unit of pressure.

kg m

^{- 1} s^{- 2}

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kg m

^{- 2} s^{- 2}

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kg m

^{- 1} s^{- 1}

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^{2}

^{- 1} s^{- 2}

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Solution

The correct option is A kg m $^{- 1} s^{- 2}$
$P r e s s u r e = \frac{F o r c e}{A r e a} = \frac{M a s s \times A c c e l e r a t i o n}{A r e a}$
$P r e s s u r e = k g \times m s^{- 2} / m^{2} = k g m^{- 1} s^{- 2}$

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Element	Subshell electronic configuration	No. of the outer most shell	Period number
$_{4} B e$	$1 s^{2} 2 s^{2}$	$2$	$2$
$_{6} C$	$1 s^{2} 2 s^{2} 2 p^{2}$	$2$	$2$
$_{11} N a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$	$3$	-
$_{19} K$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1}$		-