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प्रश्न
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
Is it more or less reactive than calcium?
उत्तर
Barium is placed below calcium in the group. Since, it has more number of shells; it is easier for it to lose its valence electrons to complete its octet configuration. Hence it is more reactive than calcium.
संबंधित प्रश्न
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
The correct increasing order of the atomic radii of the elements oxygen, fluorine and nitrogen is:
(a) O, F, N
(b) N, F, O
(c) O, N, F
(d) F, O, N
Which one of the following does not increase while moving down the group of the periodic table?
What do you understand by periodicity?
An element X belong to 4th period and 17th group, state.
name the family to which it belong.
An element X belong to 4th period and 17th group, state.
Write the formula of the compound formed when it reacts with `(27)/(13) y `
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
Arrange the following as per the instruction given in the bracket
He,Ar,Ne (Increasing order of the number of electron shells)
The electronic configuration of an element is 2, 8, 4. State it:
group and period in the Modern Periodic Table.
