What should you do if the high power objective lens touches or breaks the cover slip?

Gymnast always perform on padded mats. how does the mats protect the gymnast

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?