Mendleev classified the elements and arrranged them in the form of a table.Hydrogen which resembles alkali metals and halagens,was placed in the first group. why?How does it resemble halogens?Why do you think he named it as periodic table?
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Mendeleev considered formulae of hydrides and oxides formed by an element as one of the basic properties to classify the elements in his Periodic Table.
Hydrogen makes oxides similar to alkali metals, such as H2O (Hydrogen oxide i.e. water) and hydrides similar to halogen such as LiH (Lithium hydride), so it could be placed with halogens in the same group i.e. in VIIth group. But, hydrogen was placed with alkali metals in Ist group in Mendeleev's Periodic Table.
It appears that hydrogen is placed as starting element in 1st period and Ist group in the Mendeleev's Periodic Table. Thus, I think it was the correct position as hydrogen has been placed the same position even in Modern Periodic table.
Because.............
The periodic table is an arrangement of the elements in order of their atomic
numbers so that elements with similar properties appear in the same vertical
column or group.....
Hydrogen makes oxides similar to alkali metals, such as H2O (Hydrogen oxide i.e. water) and hydrides similar to halogen such as LiH (Lithium hydride), so it could be placed with halogens in the same group i.e. in VIIth group. But, hydrogen was placed with alkali metals in Ist group in Mendeleev's Periodic Table.
It appears that hydrogen is placed as starting element in 1st period and Ist group in the Mendeleev's Periodic Table. Thus, I think it was the correct position as hydrogen has been placed the same position even in Modern Periodic table.
Because.............
The periodic table is an arrangement of the elements in order of their atomic
numbers so that elements with similar properties appear in the same vertical
column or group.....
Answered by
1
Hey mate It's a good question.
Here is your answer..........
Ivanoich Mandeleev had proposed that the Hydrogen had one electron in it's last cell means it has only one Valence electron. And when all saw that the last shell was the first shell of Hydrogen that means Hydrogen need only 2 electrons to stable. but as he has only one so he can donate that electron or he can gain one more electron. So, Hydrogen belongs to both the group halogen and alkali group.
According to me,
he given the name periodic table because mandelleve know that after some time again new more electron will be discover and that will increase the periods not the group..........
And practically we can see that by comparing mandelleve and modern periodic table.
...so, might be he decided that to make a name of this periodic table on this(period) topic only.
I think it will help you out.......
okkkkk
Here is your answer..........
Ivanoich Mandeleev had proposed that the Hydrogen had one electron in it's last cell means it has only one Valence electron. And when all saw that the last shell was the first shell of Hydrogen that means Hydrogen need only 2 electrons to stable. but as he has only one so he can donate that electron or he can gain one more electron. So, Hydrogen belongs to both the group halogen and alkali group.
According to me,
he given the name periodic table because mandelleve know that after some time again new more electron will be discover and that will increase the periods not the group..........
And practically we can see that by comparing mandelleve and modern periodic table.
...so, might be he decided that to make a name of this periodic table on this(period) topic only.
I think it will help you out.......
okkkkk
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