Classification of Elements and Periodicity in Properties
89365
Which statement (s) is (are) false for the periodic classification of elements?
1 The properties of the elements are the periodic functions of their atomic numbers
2 Non-metallic elements are lesser in number than the metallic elements
3 The first ionisation energies of the elements along a period do not vary in a regular manner with increase in atomic number
4 For transition elements, the d-electrons are filled monotonically with increase in atomic number
5 Both (c) and (d)
Explanation:
For transition elements, the d-electrons are not filled monotonically with increase in atomic number. The first ionization energy of the element along a period vary in a regular manner with increase in atomic number.
Kerala-CEE-2018
Classification of Elements and Periodicity in Properties
89380
Beryllium resembles much with :
1 $\mathrm{Zn}$
2 $\mathrm{Al}$
3 $\mathrm{Li}$
4 $\mathrm{Ra}$
Explanation:
Beryllium resembles with aluminium due to similarity in the size of ions and similarity in electropositive character. This type of resemblance between first elements of a group in second period with second element of the next group is termed as diagonal relationship.
BITSAT 2009
Classification of Elements and Periodicity in Properties
89382
Increase in atomic size down the group is due to-
1 increase in number of electrons
2 increase in number of protons and neutrons
3 increase in number of protons
4 increase in number of protons, neutrons and electrons
Explanation:
Increase in atomic size down the group is due to increase in number of electrons. To accommodate these electrons new shells are added to the atom. These new shells take the outermost electrons farther from the nucleus causing atomic size to increase as we go down the group.
BCECE-2008
Classification of Elements and Periodicity in Properties
89383
On moving from left to right in the second period along the periodic table the gram atomic volume of the element
1 increases with constant velocity
2 remains unchanged
3 first increases and then decreases
4 decreases
Explanation:
On moving from left to right in the second period of the periodic table the gram atomic valence of the element decreases. The atomic valence of noble gases is comparatively larger as they have large Van der Waals radii due to completed valence shell, with all electrons paired which causes greater repulsion.
Classification of Elements and Periodicity in Properties
89365
Which statement (s) is (are) false for the periodic classification of elements?
1 The properties of the elements are the periodic functions of their atomic numbers
2 Non-metallic elements are lesser in number than the metallic elements
3 The first ionisation energies of the elements along a period do not vary in a regular manner with increase in atomic number
4 For transition elements, the d-electrons are filled monotonically with increase in atomic number
5 Both (c) and (d)
Explanation:
For transition elements, the d-electrons are not filled monotonically with increase in atomic number. The first ionization energy of the element along a period vary in a regular manner with increase in atomic number.
Kerala-CEE-2018
Classification of Elements and Periodicity in Properties
89380
Beryllium resembles much with :
1 $\mathrm{Zn}$
2 $\mathrm{Al}$
3 $\mathrm{Li}$
4 $\mathrm{Ra}$
Explanation:
Beryllium resembles with aluminium due to similarity in the size of ions and similarity in electropositive character. This type of resemblance between first elements of a group in second period with second element of the next group is termed as diagonal relationship.
BITSAT 2009
Classification of Elements and Periodicity in Properties
89382
Increase in atomic size down the group is due to-
1 increase in number of electrons
2 increase in number of protons and neutrons
3 increase in number of protons
4 increase in number of protons, neutrons and electrons
Explanation:
Increase in atomic size down the group is due to increase in number of electrons. To accommodate these electrons new shells are added to the atom. These new shells take the outermost electrons farther from the nucleus causing atomic size to increase as we go down the group.
BCECE-2008
Classification of Elements and Periodicity in Properties
89383
On moving from left to right in the second period along the periodic table the gram atomic volume of the element
1 increases with constant velocity
2 remains unchanged
3 first increases and then decreases
4 decreases
Explanation:
On moving from left to right in the second period of the periodic table the gram atomic valence of the element decreases. The atomic valence of noble gases is comparatively larger as they have large Van der Waals radii due to completed valence shell, with all electrons paired which causes greater repulsion.
Classification of Elements and Periodicity in Properties
89365
Which statement (s) is (are) false for the periodic classification of elements?
1 The properties of the elements are the periodic functions of their atomic numbers
2 Non-metallic elements are lesser in number than the metallic elements
3 The first ionisation energies of the elements along a period do not vary in a regular manner with increase in atomic number
4 For transition elements, the d-electrons are filled monotonically with increase in atomic number
5 Both (c) and (d)
Explanation:
For transition elements, the d-electrons are not filled monotonically with increase in atomic number. The first ionization energy of the element along a period vary in a regular manner with increase in atomic number.
Kerala-CEE-2018
Classification of Elements and Periodicity in Properties
89380
Beryllium resembles much with :
1 $\mathrm{Zn}$
2 $\mathrm{Al}$
3 $\mathrm{Li}$
4 $\mathrm{Ra}$
Explanation:
Beryllium resembles with aluminium due to similarity in the size of ions and similarity in electropositive character. This type of resemblance between first elements of a group in second period with second element of the next group is termed as diagonal relationship.
BITSAT 2009
Classification of Elements and Periodicity in Properties
89382
Increase in atomic size down the group is due to-
1 increase in number of electrons
2 increase in number of protons and neutrons
3 increase in number of protons
4 increase in number of protons, neutrons and electrons
Explanation:
Increase in atomic size down the group is due to increase in number of electrons. To accommodate these electrons new shells are added to the atom. These new shells take the outermost electrons farther from the nucleus causing atomic size to increase as we go down the group.
BCECE-2008
Classification of Elements and Periodicity in Properties
89383
On moving from left to right in the second period along the periodic table the gram atomic volume of the element
1 increases with constant velocity
2 remains unchanged
3 first increases and then decreases
4 decreases
Explanation:
On moving from left to right in the second period of the periodic table the gram atomic valence of the element decreases. The atomic valence of noble gases is comparatively larger as they have large Van der Waals radii due to completed valence shell, with all electrons paired which causes greater repulsion.
Classification of Elements and Periodicity in Properties
89365
Which statement (s) is (are) false for the periodic classification of elements?
1 The properties of the elements are the periodic functions of their atomic numbers
2 Non-metallic elements are lesser in number than the metallic elements
3 The first ionisation energies of the elements along a period do not vary in a regular manner with increase in atomic number
4 For transition elements, the d-electrons are filled monotonically with increase in atomic number
5 Both (c) and (d)
Explanation:
For transition elements, the d-electrons are not filled monotonically with increase in atomic number. The first ionization energy of the element along a period vary in a regular manner with increase in atomic number.
Kerala-CEE-2018
Classification of Elements and Periodicity in Properties
89380
Beryllium resembles much with :
1 $\mathrm{Zn}$
2 $\mathrm{Al}$
3 $\mathrm{Li}$
4 $\mathrm{Ra}$
Explanation:
Beryllium resembles with aluminium due to similarity in the size of ions and similarity in electropositive character. This type of resemblance between first elements of a group in second period with second element of the next group is termed as diagonal relationship.
BITSAT 2009
Classification of Elements and Periodicity in Properties
89382
Increase in atomic size down the group is due to-
1 increase in number of electrons
2 increase in number of protons and neutrons
3 increase in number of protons
4 increase in number of protons, neutrons and electrons
Explanation:
Increase in atomic size down the group is due to increase in number of electrons. To accommodate these electrons new shells are added to the atom. These new shells take the outermost electrons farther from the nucleus causing atomic size to increase as we go down the group.
BCECE-2008
Classification of Elements and Periodicity in Properties
89383
On moving from left to right in the second period along the periodic table the gram atomic volume of the element
1 increases with constant velocity
2 remains unchanged
3 first increases and then decreases
4 decreases
Explanation:
On moving from left to right in the second period of the periodic table the gram atomic valence of the element decreases. The atomic valence of noble gases is comparatively larger as they have large Van der Waals radii due to completed valence shell, with all electrons paired which causes greater repulsion.
