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प्रश्न
Name three elements that have a single electron in their outermost shells.
उत्तर
a) Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost shells.
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संबंधित प्रश्न
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements:
K, C, Al, Si, Ba.
Why did Mendel choose garden pea for his experiments? Write two reasons.
Use Mendeleev's Periodic Table to predict the formula of hydrides of carbon and silicon.
Which group of elements was missing from Mendeleev's original periodic table?
Give a reason for the following:
Mendeleev's contributions to the periodic table laid the foundation for the Modern Periodic Table.
Write scientific reason.
Mendeleev kept vacant places in the periodic table.
At the time of Mendeleev, the number of elements known was ______
The total number of electrons present in the first twenty elements of the periodic table is ______
Which of the following statement (s) about the Modern Periodic Table are incorrect
- The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number
- The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses
- Isotopes are placed in adjoining group (s) in the Periodic Table
- The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number
Which group of elements could be placed in Mendeléev's Periodic Table without disturbing the original order? Give reason.
