Classification of Elements and Periodicity in Properties
89317
The valency of an element depends upon the
1 total number of protons in an atom
2 mass number of an atom
3 total number of neutrons in an atom
4 total number of electrons in the outer most shell of an atom
Explanation:
The valency of an element depends upon the total number of electrons in the outer most shell of an atoms.
NDA (I)-2017
Classification of Elements and Periodicity in Properties
89323
Which of the following is non-existent?
1 $\mathrm{AlF}_6^{3-}$
2 $\mathrm{CoF}_6^{3-}$
3 $\mathrm{BF}_6^{3-}$
4 $\mathrm{SiF}_6^{2-}$
Explanation:
$\mathrm{BF}_6^{3-}$ does not exist because boron does not have $\mathrm{d}$-orbital maximum covalency of $\mathrm{B}$ is only 4 as it does not have d-orbital. $\mathrm{AlF}_6^{3-}, \mathrm{SiF}_6^{2-}, \mathrm{CoF}_6^{3-}$ exist because they have d- orbital in valence shell to expand their valency.
$\mathrm{AMU}-2010$
Classification of Elements and Periodicity in Properties
89324
The valency of the element having atomic number 9 is
1 1
2 2
3 3
4 4
Explanation:
The atomic number 9 the atom is fluorine. The electronic configuration of an element of atomic number 9 is 2, 7. It requires one electron to get stable noble gas configuration. Hence, its valency is 1 .
MPPET- 2009
Classification of Elements and Periodicity in Properties
89327
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is:
1 12
2 10
3 8
4 11
Explanation:
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is 12 because the valency of sulphur is +6 and six fluoxine atoms each having combine to sulphur.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Classification of Elements and Periodicity in Properties
89317
The valency of an element depends upon the
1 total number of protons in an atom
2 mass number of an atom
3 total number of neutrons in an atom
4 total number of electrons in the outer most shell of an atom
Explanation:
The valency of an element depends upon the total number of electrons in the outer most shell of an atoms.
NDA (I)-2017
Classification of Elements and Periodicity in Properties
89323
Which of the following is non-existent?
1 $\mathrm{AlF}_6^{3-}$
2 $\mathrm{CoF}_6^{3-}$
3 $\mathrm{BF}_6^{3-}$
4 $\mathrm{SiF}_6^{2-}$
Explanation:
$\mathrm{BF}_6^{3-}$ does not exist because boron does not have $\mathrm{d}$-orbital maximum covalency of $\mathrm{B}$ is only 4 as it does not have d-orbital. $\mathrm{AlF}_6^{3-}, \mathrm{SiF}_6^{2-}, \mathrm{CoF}_6^{3-}$ exist because they have d- orbital in valence shell to expand their valency.
$\mathrm{AMU}-2010$
Classification of Elements and Periodicity in Properties
89324
The valency of the element having atomic number 9 is
1 1
2 2
3 3
4 4
Explanation:
The atomic number 9 the atom is fluorine. The electronic configuration of an element of atomic number 9 is 2, 7. It requires one electron to get stable noble gas configuration. Hence, its valency is 1 .
MPPET- 2009
Classification of Elements and Periodicity in Properties
89327
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is:
1 12
2 10
3 8
4 11
Explanation:
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is 12 because the valency of sulphur is +6 and six fluoxine atoms each having combine to sulphur.
Classification of Elements and Periodicity in Properties
89317
The valency of an element depends upon the
1 total number of protons in an atom
2 mass number of an atom
3 total number of neutrons in an atom
4 total number of electrons in the outer most shell of an atom
Explanation:
The valency of an element depends upon the total number of electrons in the outer most shell of an atoms.
NDA (I)-2017
Classification of Elements and Periodicity in Properties
89323
Which of the following is non-existent?
1 $\mathrm{AlF}_6^{3-}$
2 $\mathrm{CoF}_6^{3-}$
3 $\mathrm{BF}_6^{3-}$
4 $\mathrm{SiF}_6^{2-}$
Explanation:
$\mathrm{BF}_6^{3-}$ does not exist because boron does not have $\mathrm{d}$-orbital maximum covalency of $\mathrm{B}$ is only 4 as it does not have d-orbital. $\mathrm{AlF}_6^{3-}, \mathrm{SiF}_6^{2-}, \mathrm{CoF}_6^{3-}$ exist because they have d- orbital in valence shell to expand their valency.
$\mathrm{AMU}-2010$
Classification of Elements and Periodicity in Properties
89324
The valency of the element having atomic number 9 is
1 1
2 2
3 3
4 4
Explanation:
The atomic number 9 the atom is fluorine. The electronic configuration of an element of atomic number 9 is 2, 7. It requires one electron to get stable noble gas configuration. Hence, its valency is 1 .
MPPET- 2009
Classification of Elements and Periodicity in Properties
89327
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is:
1 12
2 10
3 8
4 11
Explanation:
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is 12 because the valency of sulphur is +6 and six fluoxine atoms each having combine to sulphur.
Classification of Elements and Periodicity in Properties
89317
The valency of an element depends upon the
1 total number of protons in an atom
2 mass number of an atom
3 total number of neutrons in an atom
4 total number of electrons in the outer most shell of an atom
Explanation:
The valency of an element depends upon the total number of electrons in the outer most shell of an atoms.
NDA (I)-2017
Classification of Elements and Periodicity in Properties
89323
Which of the following is non-existent?
1 $\mathrm{AlF}_6^{3-}$
2 $\mathrm{CoF}_6^{3-}$
3 $\mathrm{BF}_6^{3-}$
4 $\mathrm{SiF}_6^{2-}$
Explanation:
$\mathrm{BF}_6^{3-}$ does not exist because boron does not have $\mathrm{d}$-orbital maximum covalency of $\mathrm{B}$ is only 4 as it does not have d-orbital. $\mathrm{AlF}_6^{3-}, \mathrm{SiF}_6^{2-}, \mathrm{CoF}_6^{3-}$ exist because they have d- orbital in valence shell to expand their valency.
$\mathrm{AMU}-2010$
Classification of Elements and Periodicity in Properties
89324
The valency of the element having atomic number 9 is
1 1
2 2
3 3
4 4
Explanation:
The atomic number 9 the atom is fluorine. The electronic configuration of an element of atomic number 9 is 2, 7. It requires one electron to get stable noble gas configuration. Hence, its valency is 1 .
MPPET- 2009
Classification of Elements and Periodicity in Properties
89327
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is:
1 12
2 10
3 8
4 11
Explanation:
The number of electrons in the valence shell of sulphur in $\mathrm{SF}_6$ is 12 because the valency of sulphur is +6 and six fluoxine atoms each having combine to sulphur.
