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प्रश्न
Beryllium and calcium are alkaline earth metals.
विकल्प
Right
Wrong
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उत्तर
Beryllium and calcium are alkaline earth metals- Right
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संबंधित प्रश्न
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3?
An element has its electron configuration as 2,8,2. Now answer the following questions.
i. What is the atomic number of this element?
ii. What is the valency of this element?
iii. What is the group of this element?
iv. To which period does this element belong?
v. With which of the following elements would this element resemble?
`_7N , _4Be , _18Ar , _17CL`
Which of this element belong to the period 3? Write their electronic configuration
`3^(Li) , 14^(Si) , 2^(He) , 15^(P)`
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the group of this element?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
To which period does this element belong?
_______ is the outermost shell for elements of period 2.
Which pair of atomic numbers represents elements in the same group?
Which among the following elements would lose an electron easily?
Find the odd one out and give its explanation.
Find the odd one out and give its explanation.
What determines the chemical reactivity of elements?
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
The valency of the elements in group 2 is 1.
The elements lithium and beryllium are in the same period because their valencies are similar.
In group 2, beryllium and calcium elements, calcium is more electropositive element than beryllium.
Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?
