10 std cbse
answer this
Attachments:
Answers
Answered by
1
Dear friend,
Kindly mark the answer as brainliest if you find it useful.
Here's what you were looking for:
➡Question:1. How were the positions of cobalt and nickel resolved in the Modern Periodic Table?
Answer: Modern Periodic Table is based on the Atomic Number of elements and elements are arranged in the increasing order of their atomic number.
Cobalt has atomic number equal to 27 and nickel has atomic number equal to 28. Thus these elements are placed in their correct order of increasing atomic number.
In Mendeleev's Periodic Table also these elements had same position and order.
➡Question:2. How the position of isotopes of various elements decided in the Modern Periodic Table?
Answer: Modern Periodic Table is based on the Atomic Number of elements and elements are arranged in the increasing order of their atomic number.
Since, isotopes has same atomic number but different atomic masses, and in Modern Periodic Table elements are arranged in the increasing order of their atomic numbers, thus there is no need to assign separate place for them.
➡Question:3. Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium?
Answer: Atomic number 1.5 is not possible as atomic number is equal to number of protons and equal to number of electrons. It is not possible of existence of half proton or electron.
So, there is no question of placement of such element as existence of such element is not possible.
➡Question:4. Where do you think should hydrogen be placed in Modern Periodic table?
Answer: Since, elements having same valence electrons are placed in same group and hydrogen have valence electron equal to one, so hydrogen is placed with the elements having same number of valence electrons, in first group. Thus, position of hydrogen in Modern Periodic Table is correct.
Hope this clears your doubt.✌
DO FOLLOW ME FOR SUCH QUALITY ANSWERS.
Kindly mark the answer as brainliest if you find it useful.
Here's what you were looking for:
➡Question:1. How were the positions of cobalt and nickel resolved in the Modern Periodic Table?
Answer: Modern Periodic Table is based on the Atomic Number of elements and elements are arranged in the increasing order of their atomic number.
Cobalt has atomic number equal to 27 and nickel has atomic number equal to 28. Thus these elements are placed in their correct order of increasing atomic number.
In Mendeleev's Periodic Table also these elements had same position and order.
➡Question:2. How the position of isotopes of various elements decided in the Modern Periodic Table?
Answer: Modern Periodic Table is based on the Atomic Number of elements and elements are arranged in the increasing order of their atomic number.
Since, isotopes has same atomic number but different atomic masses, and in Modern Periodic Table elements are arranged in the increasing order of their atomic numbers, thus there is no need to assign separate place for them.
➡Question:3. Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium?
Answer: Atomic number 1.5 is not possible as atomic number is equal to number of protons and equal to number of electrons. It is not possible of existence of half proton or electron.
So, there is no question of placement of such element as existence of such element is not possible.
➡Question:4. Where do you think should hydrogen be placed in Modern Periodic table?
Answer: Since, elements having same valence electrons are placed in same group and hydrogen have valence electron equal to one, so hydrogen is placed with the elements having same number of valence electrons, in first group. Thus, position of hydrogen in Modern Periodic Table is correct.
Hope this clears your doubt.✌
DO FOLLOW ME FOR SUCH QUALITY ANSWERS.
Similar questions