Question

name all element for which mandleev left space and shortcut to learn it??​

Answer 1

Answer:

✨Gallium, germanium, scandium and technetium✨ are the elements which Mendeléev left spaces as these all elements were unknown till 1871 and he predicted the atomic masses and chemical properties for the undiscovered elements.

Explanation:

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Answer 2

Answer:

Gallium, germanium, scandium and technetium are the elements which Mendeléev left spaces as these all elements were unknown till 1871 and he predicted the atomic masses and chemical properties for the undiscovered elements.