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An element belongs to period 2 and group 2th, then 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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Verified Answer
An element belongs to period 2 and group 2th, thennumber of valence el...
The elememt belongs to group 2 and period 2 is Be( atomic number 4)
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An element belongs to period 2 and group 2th, thennumber of valence el...
Periodic Table
The periodic table of elements is a tabular arrangement of chemical elements, organized based on their atomic numbers, electron configurations, and recurring chemical properties. It is divided into periods (horizontal rows) and groups (vertical columns). Each element in the periodic table belongs to a specific period and group.
Period 2 and Group 2
In the given question, the element belongs to period 2 and group 2.
Period 2
- Period 2 of the periodic table consists of elements with atomic numbers 3 to 10.
- These elements have two energy levels or shells: the first energy level can accommodate a maximum of 2 electrons, and the second energy level can accommodate a maximum of 8 electrons.
Group 2
- Group 2 of the periodic table is also known as the alkaline earth metals.
- Elements in group 2 have two valence electrons, which are the electrons present in the outermost energy level of an atom.
- These valence electrons are involved in chemical reactions and determine the chemical properties of the element.
Number of Valence Electrons
The number of valence electrons in an atom can be determined by looking at the group number of the element. In this case, since the element belongs to group 2, it has 2 valence electrons.
Answer
Therefore, the correct answer is option 'A' which states that the number of valence electrons in the atoms of this element is 2.
The periodic table of elements is a tabular arrangement of chemical elements, organized based on their atomic numbers, electron configurations, and recurring chemical properties. It is divided into periods (horizontal rows) and groups (vertical columns). Each element in the periodic table belongs to a specific period and group.
Period 2 and Group 2
In the given question, the element belongs to period 2 and group 2.
Period 2
- Period 2 of the periodic table consists of elements with atomic numbers 3 to 10.
- These elements have two energy levels or shells: the first energy level can accommodate a maximum of 2 electrons, and the second energy level can accommodate a maximum of 8 electrons.
Group 2
- Group 2 of the periodic table is also known as the alkaline earth metals.
- Elements in group 2 have two valence electrons, which are the electrons present in the outermost energy level of an atom.
- These valence electrons are involved in chemical reactions and determine the chemical properties of the element.
Number of Valence Electrons
The number of valence electrons in an atom can be determined by looking at the group number of the element. In this case, since the element belongs to group 2, it has 2 valence electrons.
Answer
Therefore, the correct answer is option 'A' which states that the number of valence electrons in the atoms of this element is 2.
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Community Answer
An element belongs to period 2 and group 2th, thennumber of valence el...
Beryllium atomic number is 4. thus 2 electrons will be accommodated in first and other 2 in next shell(that is .,it is the outer or valence shell). valence shell contains 2 electrons. so the answer is 2.
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An element belongs to period 2 and group 2th, thennumber 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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