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a) we classify elements for better understanding.
we also classify elements for the ease of remembering and speciically research through each classification.
b)he used the increasing order of their atomic masses and similarity of their chemical properties.
c)mendeleev left space for the undiscovered elements. he named these empty spaces using sanskrit numericals to the suffix of the preceeding element of the same group.
d)there was no mention about noble gases because they had been discovered very late compared to other elements. and when they were discovered he could place them in his periodic table without changing the places of the previous elements (by forming a new group.)
e) the two isotopes of chlorine in the same slot because it is proved that the atomic number of an element is considered to be the most fundamental property than the atomic masses.
8. the object is places between the pole of the mirror and the focus. the image is erect and virtual. the image is highle enlarged but behind the mirror. i dont think i will be able to draw the ray diagram.
10. a) the boy is suffering from hypermetropia.
b) again i can't draw the diagram!
c) concave lens can be used to correct his defect of vision.
sorry for not attending the 7th cuz i didnt know 9th question because i cant draw the diagram!
hope this helped you.
plz mark this the brainliest answer!
we also classify elements for the ease of remembering and speciically research through each classification.
b)he used the increasing order of their atomic masses and similarity of their chemical properties.
c)mendeleev left space for the undiscovered elements. he named these empty spaces using sanskrit numericals to the suffix of the preceeding element of the same group.
d)there was no mention about noble gases because they had been discovered very late compared to other elements. and when they were discovered he could place them in his periodic table without changing the places of the previous elements (by forming a new group.)
e) the two isotopes of chlorine in the same slot because it is proved that the atomic number of an element is considered to be the most fundamental property than the atomic masses.
8. the object is places between the pole of the mirror and the focus. the image is erect and virtual. the image is highle enlarged but behind the mirror. i dont think i will be able to draw the ray diagram.
10. a) the boy is suffering from hypermetropia.
b) again i can't draw the diagram!
c) concave lens can be used to correct his defect of vision.
sorry for not attending the 7th cuz i didnt know 9th question because i cant draw the diagram!
hope this helped you.
plz mark this the brainliest answer!
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