Periodic Classification of Elements- 03

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Q1. Mendeleev classified elements in *

1 point

eight periods and seven groups

seven periods and nine groups

eight periods and eight groups

increasing order of atomic groups

Q2. Select the correct chronological order for the discoveries of the following scientists. Dobereiner, Newlands, Chancourtois, Mendeleev *

1 point

Chancourtois, Dobereiner, Newlands, Mendeleev

Chancourtois, Newlands, Dobereiner, Mendeleev

Dobereiner, Newlands, Chancourtois, Mendeleev

Dobereiner, Chancourtois, Newlands, Mendeleev

Q3. The molecular formula of chloride of Eka-Aluminium and Eka-Silicon respectively are *

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GaCl3 and AlCl3

GaCl3 and GeCl4

GaCl3 and SiO4

AlCl3 and SiCl4

Q4. Who developed long form of the periodic table? *

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Neils Bohr

Moseley

Mendeleev

Lothar Meyer

Q5. At present, how many elements are known *

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100

118

Q6. Which of the scientists given below discovered that periodic table should be based on the atomic number ? *

1 point

Mendeleev

Moseley

Lothar Meyer

Newlands

Q7. How many elements are there in 6th period of periodic table? *

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Q8. Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance ofthe atomic number was *

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Bragg’s work on X-ray diffraction

Mulliken’s oil drop experiment

Mosley’s work on X-ray spectra

Discovery of X-rays by Rontgen

Q9. The period number in the periodic table corresponds to the...A... principal quantum number (n) of the elements. Here, A refers to *

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None

Middle

Highest

Lowest

Q10. The symbol and IUPAC name for the element with atomic number 120, respectively are *

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Ubn and unbiunium

Ubn and unbinilium

Ubn and unnibium

Ubn and unnilium

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