attempts of classification of elements

Mendeleev arranged ...........elements

• 76

• 67

• 70

• 60

moseley arranged the elements according to .................

• atomic number

• atomic weight

Mendeleev put elements in vertical rows according to ......

• atomic weight

• atomic number

• properties

mendeleev explained his periodic table in his book which is called ............

moseley corrected the atomic weights of some elements ,which were estimated wrongly

• true

• false

after moseley studying ...............rays properties

the properties of elements is related to their ...................not to ....................

• gamma ,atomic no ,atomic weight

• x , atomic weight ,atomic no

• gamma ,atomic weight ,atomic no

• x,atomic no ,atomic weight

moseley discovered the positive protons particles

• true

• false

why mendeleev have to deal with isotopes ?

• due to the similarity of properties

• due to the similarity of atomic weight

• due to the difference in their atomic weight

• due to the difference in their properties

moseley specified a place below the table for ...........,.............