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An element belongs to period 2 and group 2 th number of valence electrons in the atoms of this element is.
- a)2
- b)4
- c)3
- d)1
Correct answer is option 'A'. Can you explain this answer?
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An element belongs to period 2 and group 2 th number of valence electr...
It is known that group of an atom tells the number of valence electrons holded by an atom. On the other hand, period number tells the number of shells present in an atom.
For example, an element belong to period 2 and group 2 will have the electronic configuration as .
1s^22s^2
This means that atomic number of this element is 4 and it is beryllium. And, it has 2 valence electrons.
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An element belongs to period 2 and group 2 th number of valence electr...
Understanding Periodic Table Position
The periodic table is organized into periods (rows) and groups (columns). Each element's position indicates its electronic configuration and properties.
Element in Period 2 and Group 2
- Period 2 contains elements with atomic numbers 3 to 10.
- Group 2 corresponds to the alkaline earth metals, which are characterized by having two valence electrons.
Valence Electrons Explained
- Valence electrons are the electrons in the outermost shell of an atom.
- They play a crucial role in determining an element's chemical behavior and bonding characteristics.
Specifics of Group 2 Elements
- The elements in Group 2 of the periodic table include:
- Beryllium (Be)
- Magnesium (Mg)
- Calcium (Ca)
- Strontium (Sr)
- Barium (Ba)
- Radium (Ra)
- Among these, only Beryllium (Be) is in Period 2.
Conclusion: Valence Electrons Count
- Beryllium has 2 valence electrons in its outer shell (configuration: 1s² 2s²).
- Therefore, the correct answer to the question regarding the number of valence electrons for an element in Period 2 and Group 2 is indeed 2.
Final Answer
- The number of valence electrons in the atoms of this element is 2 (Option A).
The periodic table is organized into periods (rows) and groups (columns). Each element's position indicates its electronic configuration and properties.
Element in Period 2 and Group 2
- Period 2 contains elements with atomic numbers 3 to 10.
- Group 2 corresponds to the alkaline earth metals, which are characterized by having two valence electrons.
Valence Electrons Explained
- Valence electrons are the electrons in the outermost shell of an atom.
- They play a crucial role in determining an element's chemical behavior and bonding characteristics.
Specifics of Group 2 Elements
- The elements in Group 2 of the periodic table include:
- Beryllium (Be)
- Magnesium (Mg)
- Calcium (Ca)
- Strontium (Sr)
- Barium (Ba)
- Radium (Ra)
- Among these, only Beryllium (Be) is in Period 2.
Conclusion: Valence Electrons Count
- Beryllium has 2 valence electrons in its outer shell (configuration: 1s² 2s²).
- Therefore, the correct answer to the question regarding the number of valence electrons for an element in Period 2 and Group 2 is indeed 2.
Final Answer
- The number of valence electrons in the atoms of this element is 2 (Option A).
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An element belongs to period 2 and group 2 th number of valence electrons in the atoms of this element is.a)2b)4c)3d)1Correct answer is option 'A'. Can you explain this answer?
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