Which answer best explains why mendeleev's periodic table became the first widely accepted organized scheme for the elements?

mendeleev, as a russian scientist, had a better scientific reputation at that time.

mendeleev was born from a prominent family and therefore his work got more attention.

mendeleev mounted a campaign to discredit all earlier versions because they had no validity.

mendeleev's investigations suggested previous versions did not work for all known elements.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

What is the mass of each element in a 324.8 sample of co2