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प्रश्न
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
विकल्प
11
15
16
10
उत्तर
10
If the atomic number of X is 13, the number of electrons in its X3+ ion would be 13 – 3 = 10.
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संबंधित प्रश्न
Name the element used as a standard for atomic mass scale.
Give the names and symbols of five familiar substances which you think are elements.
Name the elements represented by the following symbols :
Hg, Pb, Au, Ag, Sn
Explain the terms 'valency' and 'variable valency'.
Fill in the blank:
Symbol represents _____ atom(s) of an element.
Give the names and symbols of the first twenty elements of the periodic table.
State the type of element for the following:
Silicon
State the type of element for the following:
Lead
Give the symbol of the following element:
Sulphite
Write the chemical formula of the following:
zinc oxide
