Write down the subshell electronic configuration of the elements given below and complete the table. Element Number of electrons Subshell electronic configuration N 7 7 1 s 2 2 s 2 2 p 3 F 9 9 1 s . . . 2 s . . . 2 p . . . Na 11 - 1 s . . . 2 s . . . 2 p . . . 3 s . . . Al 13 - 1 s . . . 2 s . . . 2 p . . . 3 s . . . 3 p . . . Cl 17 - - Ar 18 - -

The number on the left side of the shell subshell denotes the shell number and the number on the top right side denotes the number of electrons. Element Number of electrons Subshell electronic configuration N 7 7 1 s 2 2 s 2 2 p 3 F 9 9 1 s 2 2 s 2 2 p 5 Na 11 11 1 s 2 2 s 2 2 p 6 3 s 1 Al 13 13 1 s 2 2 s 2 2 p 6 3 s 2 3 p 1 Cl 17 17 1 s 2 2 s 2 2 p 6 3 s 2 3 p 5 Ar 18 18 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6

The electronic configuration of scandium Sc 21 is 2 , 8 , 9 , 2 . How can we write its sub-shell electronic configuration?

According to the octet rule, an atoms' outermost shell can accommodate maximum 8 electrons (except K shell that can accommodate maximum 2 electrons). Hence, the electronic configuration of potassium is 2 , 8 , 8 , 2 . The sub-shell wise electronic configuration of scandium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 1 .

Write the electronic configuration of Ti 22 , V 23 , the two elements after Sc .

The atomic number of titanium is 22 and the electronic configuration is Ti 22 - 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 2 4 s 2 . Titanium is the second element in the d-block, which consists of transition elements. The atomic number of vanadium is 23 and the electronic configuration is V 23 - 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 3 4 s 2 . Vanadium is the third element in the d-block, which consists of transition elements.

Which is the noble gas preceding sodium Na 11 ?

The noble gas preceding sodium is Neon Ne . A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of neon for the 1 s 2 2 s 2 2 p 6 part of the configuration. Sodium noble gas configuration becomes [ Ne ] 3 s 1 .

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Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

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Complete the electronic configuration of beryllium?

Important Questions on Periodic Table and Electronic Configuration

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Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

Write the electronic configuration of Boron?

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Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

Write the electronic configuration of carbon?

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Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise

Write down the subshell electronic configuration of the elements given below and complete the table.

Element	Number of electrons	Subshell electronic configuration
${}_{7}N$	$7$	$1 s^{2} 2 s^{2} 2 p^{3}$
${}_{9}F$	$9$	$1 s^{. . .} 2 s^{. . .} 2 p^{. . .}$
${}_{11}{Na}$	-	$1 s^{. . .} 2 s^{. . .} 2 p^{. . .} 3 s^{. . .}$
${}_{13}{Al}$	-	$1 s^{. . .} 2 s^{. . .} 2 p^{. . .} 3 s^{. . .} 3 p^{. . .}$
${}_{17}{Cl}$	-	-
${}_{18}{Ar}$	-	-