Since Be lies to the extreme left hand side of the periodic table, Be is the most metallic among the given elements. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Since Be lies to the extreme left hand side of the periodic table, Be is the most metallic
among the given elements.
Among the first ten elements, lithium (Li) and beryllium (Be) are metals. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Among the first ten elements, lithium (Li) and beryllium (Be) are metals.
Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while neon has an octet in its L shell. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet
in its K shell, while neon has an octet in its L shell.
Yes. The atoms of all the three elements lithium, sodium, and potassium have one electron in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Yes. The atoms of all the three elements lithium, sodium, and potassium have one
electron in their outermost shells.
Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells.
Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells.
Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost
shells.
Calcium (Ca) and strontium (Sr) are expected to show chemical reactions similar to magnesium (Mg). This is because the number of valence electrons (2) is same in all these three elements. And since chemical properties are due to valence electrons, they show same chemical reactions. For more answersRead more
Calcium (Ca) and strontium (Sr) are expected to show chemical reactions similar to magnesium (Mg). This is because the number of valence electrons (2) is same in all these three elements. And since chemical properties are due to valence electrons, they show same chemical reactions.
Mendeleev was unable to give fixed position to hydrogen and isotopes in the periodic table. In Mendeleev’s periodic table, the increasing manner of atomic mass of the elements is not always regular from one to its next. It was believed that a more fundamental property than atomic mass could explainRead more
Mendeleev was unable to give fixed position to hydrogen and isotopes in the periodic table.
In Mendeleev’s periodic table, the increasing manner of atomic mass of the elements is not always regular from one to its next. It was believed that a more fundamental property than atomic mass could explain periodic properties in a better manner.
It was Henry Moseley who demonstrated that atomic number of an element could explain periodic properties in a better way than atomic mass of an element and arranged the elements in increasing order of their atomic numbers. Then it was found that the various anomalies of Mendeleev’s periodic table were removed by the modern periodic table.
Noble gases are inert elements. Their properties are different from the all other elements. Therefore, the noble gases are placed in a separate group. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Noble gases are inert elements. Their properties are different from the all other elements.
Therefore, the noble gases are placed in a separate group.
By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic? Ga Ge As Se Be
Since Be lies to the extreme left hand side of the periodic table, Be is the most metallic among the given elements. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Since Be lies to the extreme left hand side of the periodic table, Be is the most metallic
among the given elements.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
In the Modern Periodic Table, which are the metals among the first ten elements?
Among the first ten elements, lithium (Li) and beryllium (Be) are metals. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Among the first ten elements, lithium (Li) and beryllium (Be) are metals.
For more answers visit to website:
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Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while neon has an octet in its L shell. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet
in its K shell, while neon has an octet in its L shell.
For more answers visit to website:
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Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
Yes. The atoms of all the three elements lithium, sodium, and potassium have one electron in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Yes. The atoms of all the three elements lithium, sodium, and potassium have one
electron in their outermost shells.
For more answers visit to website:
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Name three elements with filled outermost shells.
Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells.
For more answers visit to website:
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Name two elements that have two electrons in their outermost shells.
Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells.
For more answers visit to website:
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Name three elements that have a single electron in their outermost shells.
Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost shells. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost
shells.
For more answers visit to website:
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Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Calcium (Ca) and strontium (Sr) are expected to show chemical reactions similar to magnesium (Mg). This is because the number of valence electrons (2) is same in all these three elements. And since chemical properties are due to valence electrons, they show same chemical reactions. For more answersRead more
Calcium (Ca) and strontium (Sr) are expected to show chemical reactions similar to magnesium (Mg). This is because the number of valence electrons (2) is same in all these three elements. And since chemical properties are due to valence electrons, they show same chemical reactions.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table?
Mendeleev was unable to give fixed position to hydrogen and isotopes in the periodic table. In Mendeleev’s periodic table, the increasing manner of atomic mass of the elements is not always regular from one to its next. It was believed that a more fundamental property than atomic mass could explainRead more
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Why do you think the noble gases are placed in a separate group?
Noble gases are inert elements. Their properties are different from the all other elements. Therefore, the noble gases are placed in a separate group. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Noble gases are inert elements. Their properties are different from the all other elements.
Therefore, the noble gases are placed in a separate group.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/