Following properties are common in the atoms of Helium and Neon: (i) Both have completely filled outermost orbit. (ii) Both have stable electronic configuration. (iii) Both belong to same group, i.e. zero group in Modern Periodic Table.
Following properties are common in the atoms of Helium and Neon:
(i) Both have completely filled outermost orbit.
(ii) Both have stable electronic configuration.
(iii) Both belong to same group, i.e. zero group in Modern Periodic Table.
Lithium, Sodium and Potassium have following similarities: (i) They all have valence electron equal to 1. (ii) They all belong to same group, i.e. Group 1st in Periodic Table. (iii) They all form ionic bond with non-metals. (iv) They all are highly electropositive. (v) They all are highly reactive.
Lithium, Sodium and Potassium have following similarities:
(i) They all have valence electron equal to 1.
(ii) They all belong to same group, i.e. Group 1st in Periodic Table.
(iii) They all form ionic bond with non-metals.
(iv) They all are highly electropositive.
(v) They all are highly reactive.
Beryllium and Calcium. These elements show chemical reactions similar to magnesium because magnesium, calcium and beryllium belong to same group, i.e. Group 2nd in the Modern Periodic Table.
Beryllium and Calcium. These elements show chemical reactions similar to magnesium because magnesium, calcium and beryllium belong to same group, i.e. Group 2nd in the Modern Periodic Table.
Various anomalies of Mendeleev’s Periodic Table removed as follows in the Modern Periodic Table: (i) Elements are arranged in the increasing order of their atomic number in Modern Periodic Table, thus there was no need for keeping more than one element in one slot. (ii) In Modern Periodic Table therRead more
Various anomalies of Mendeleev’s Periodic Table removed as follows in the Modern Periodic Table:
(i) Elements are arranged in the increasing order of their atomic number in Modern Periodic Table, thus there was no need for keeping more than one element in one slot.
(ii) In Modern Periodic Table there was no problem of the place of isotopes, as isotopes have same atomic mass with different atomic numbers.
(iii) Elements having same valence electron are kept in same group.
(iv) Elements having same number of shells were put under the same period.
(v) Position of hydrogen became clarified in as it is kept in the group with the elements of same valence electrons.
Since, noble gases are inert and all of them show similar properties, thus they have unique properties compare to other elements, thus they are placed in a separate group in Periodic Table.
Since, noble gases are inert and all of them show similar properties, thus they have unique properties compare to other elements, thus they are placed in a separate group in Periodic Table.
Mendeleev used atomic mass of the elements as the unique criteria of the elements. He proposed that the chemical properties of elements are the periodic function of their atomic masses. And thus, he arranged the elements in the increasing order of their atomic masses.
Mendeleev used atomic mass of the elements as the unique criteria of the elements. He proposed that the chemical properties of elements are the periodic function of their atomic masses. And thus, he arranged the elements in the increasing order of their atomic masses.
Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
Following properties are common in the atoms of Helium and Neon: (i) Both have completely filled outermost orbit. (ii) Both have stable electronic configuration. (iii) Both belong to same group, i.e. zero group in Modern Periodic Table.
Following properties are common in the atoms of Helium and Neon:
See less(i) Both have completely filled outermost orbit.
(ii) Both have stable electronic configuration.
(iii) Both belong to same group, i.e. zero group in Modern Periodic Table.
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
Lithium, Sodium and Potassium have following similarities: (i) They all have valence electron equal to 1. (ii) They all belong to same group, i.e. Group 1st in Periodic Table. (iii) They all form ionic bond with non-metals. (iv) They all are highly electropositive. (v) They all are highly reactive.
Lithium, Sodium and Potassium have following similarities:
See less(i) They all have valence electron equal to 1.
(ii) They all belong to same group, i.e. Group 1st in Periodic Table.
(iii) They all form ionic bond with non-metals.
(iv) They all are highly electropositive.
(v) They all are highly reactive.
Name three elements with filled outermost shells.
Neon, Argon and Krypton
Neon, Argon and Krypton
See lessName two elements that have two electrons in their outermost shells.
Calcium and Magnesium
Calcium and Magnesium
See lessName three elements that have a single electron in their outermost shells.
Hydrogen, Lithium and Sodium
Hydrogen, Lithium and Sodium
See lessName two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Beryllium and Calcium. These elements show chemical reactions similar to magnesium because magnesium, calcium and beryllium belong to same group, i.e. Group 2nd in the Modern Periodic Table.
Beryllium and Calcium. These elements show chemical reactions similar to magnesium because magnesium, calcium and beryllium belong to same group, i.e. Group 2nd in the Modern Periodic Table.
See lessHow could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table?
Various anomalies of Mendeleev’s Periodic Table removed as follows in the Modern Periodic Table: (i) Elements are arranged in the increasing order of their atomic number in Modern Periodic Table, thus there was no need for keeping more than one element in one slot. (ii) In Modern Periodic Table therRead more
Various anomalies of Mendeleev’s Periodic Table removed as follows in the Modern Periodic Table:
See less(i) Elements are arranged in the increasing order of their atomic number in Modern Periodic Table, thus there was no need for keeping more than one element in one slot.
(ii) In Modern Periodic Table there was no problem of the place of isotopes, as isotopes have same atomic mass with different atomic numbers.
(iii) Elements having same valence electron are kept in same group.
(iv) Elements having same number of shells were put under the same period.
(v) Position of hydrogen became clarified in as it is kept in the group with the elements of same valence electrons.
Why do you think the noble gases are placed in a separate group?
Since, noble gases are inert and all of them show similar properties, thus they have unique properties compare to other elements, thus they are placed in a separate group in Periodic Table.
Since, noble gases are inert and all of them show similar properties, thus they have unique properties compare to other elements, thus they are placed in a separate group in Periodic Table.
See lessWhat were the criteria used by Mendeleev in creating his Periodic Table?
Mendeleev used atomic mass of the elements as the unique criteria of the elements. He proposed that the chemical properties of elements are the periodic function of their atomic masses. And thus, he arranged the elements in the increasing order of their atomic masses.
Mendeleev used atomic mass of the elements as the unique criteria of the elements. He proposed that the chemical properties of elements are the periodic function of their atomic masses. And thus, he arranged the elements in the increasing order of their atomic masses.
See lessBesides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
Scandium and Germanium
Scandium and Germanium
See less