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 .

Find out the preceding noble gas with the help of the periodic table and complete the given table. Element Sub-shell electronic configuration Sc 21 Ar 3 d 1 4 s 2 Ca 20 ................. Mg 12 ................. Co 27 ................. Zn 30 .................

The electronic configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. Element sub-shell electronic configuration Sc 21 Ar 3 d 1 4 s 2 Ca 20 Ar 4 s 2 Mg 12 Ne 3 s 2 Co 27 Ar 3 d 7 4 s 2 Zn 30 Ar 3 d 10 4 s 2

Write the sub-shell electronic configuration of Cr 24 .

The atomic number of chromium is 24 . The electronic configuration for chromium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 4 . However, in the case of chromium there is one empty d sub-orbital, one of the electrons from the 4 s orbital will move up to the 3 d orbital and make the actual electronic configuration 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 1 3 d 5 . Predicted electronic configurations: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 4 . Actual electronic configurations: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 1 3 d 5 .

E M B I B E

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

MEDIUM

10th Kerala Board

IMPORTANT

Earn 100

Write the sub-shell wise electronic configuration of potassium.

Important Questions on Periodic Table and Electronic Configuration

MEDIUM

10th Kerala Board

IMPORTANT

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

The electronic configuration of scandium

({}_{21}{Sc})

is

2, 8, 9, 2

. How can we write its sub-shell electronic configuration?

MEDIUM

10th Kerala Board

IMPORTANT

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

Write the electronic configuration of

{}_{22}{Ti}, {}_{23}V

, the two elements after

Sc

.

MEDIUM

10th Kerala Board

IMPORTANT

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

Which is the noble gas preceding sodium

{}_{11}{Na}

?

EASY

10th Kerala Board

IMPORTANT

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

Write the sub-shell electronic configuration of neon.

MEDIUM

10th Kerala Board

IMPORTANT

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

Write the sub-shell electronic configuration of sodium?

MEDIUM

10th Kerala Board

IMPORTANT

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

Using the symbol of neon, write the subshell electronic configuration of sodium?

HARD

10th Kerala Board

IMPORTANT

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

Find out the preceding noble gas with the help of the periodic table and complete the given table.

Element	Sub-shell electronic configuration
${}_{21}{Sc}$	$[Ar] 3 d^{1} 4 s^{2}$
${}_{20}{Ca}$	.................
${}_{12}{Mg}$	.................
${}_{27}{Co}$	.................
${}_{30}{Zn}$	.................