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प्रश्न
The similarities in the properties of a group of elements are because they have the same ______.
विकल्प
electronic configuration
number of outer electrons
atomic numbers
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उत्तर
The similarities in the properties of a group of elements are because they have the same number of outer electrons.
संबंधित प्रश्न
Consider two elements 'X' (Atomic number 17) and 'Y' (Atomic number 20)
(i) Write the positions of these elements in the modern periodic table giving justification.
(ii) Write the formula of the compound formed by the combination of 'X' and 'Y'.
(iii) Draw the electron-dot structure of the compound formed and state the nature of the bond formed between the two elements ?
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
In which part of a group would you separately expect the elements to have the greatest metallic character
State the valency of the elements of periods 3 and write the formula of their oxides.
Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1, 3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valences. Write the molecular formula of the compound formed when P and S combine.
K, Pb, Ca, Zn (In the increasing order of the reactivity)
Explain
Size of atom changes when it loses or gain electron
Select the correct answer
Identify the metalloid
Give the number of the group and the period of elements having three shells with three electrons in valence shell.
Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
