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प्रश्न
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.
विकल्प
The elements become less metallic in nature.
The number of valence electrons increases.
The atoms lose their electrons more easily.
The oxides become more acidic.
उत्तर
The atoms lose their electrons more easily.
Explanation:
On moving from left to right in the periodic table, the tendency of an atom to lose electrons decreases.
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संबंधित प्रश्न
What name were given by Mendeleev to the then undiscovered element scandium.
Why did Mendeleev leave some gaps in his periodic table?
In Mendeleev's periodic table, gap was not left for one of the following elements. This element is:
(a) gallium
(b) beryllium
(c) germanium
(d) scandium
Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium, and eka-silicon.
(a) Name the element which has taken the place of (i) eka-aluminium, and (ii) eka-silicon
(b) Mention the period/periods of these elements in the modern periodic table.
(c) Write the group/ groups of these elements in the modern periodic table.
(d) Classify these elements as metals, non-metals or metalloids.
(e) How many valence electrons are present in the atoms of each of these elements?
Why could no fixed position be given to hydrogen in Mendeleev's periodic table?
The correct formula of the oxide of Eka-aluminium element predicted by Mendeleev was:
(a) EaO3
(b) Ea3O2
(c) Ea2O3
(d) EaO
The elements from the zero group are called _______.
Two elements in the same position : demerit of Newland's octaves : : place for Isotopes : _______
Write the name.
The family of elements having zero valency.
Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.
