Periodic Table s p d f Blocks. Periodic table is divided into four blocks, and elements are placed into these blocks based on the sub-shell in which their last electron enters. This classification divides the elements into four types s-, p-, d- and f- block elements.
It was during this visit that Ansel Adams took his first shot with his new Kodak Brownie Box camera. It highly fascinated him. In 1917, he returned alone to the National Park; this time equipped with a better camera and tripod. The visit intensified his interest in photography.
And a good picture does something like that. ... the best of Ansel's ....are part of our memory, part of our sense of what a picture might be made out of, what it might look like and what it might ultimately be about, which is the part we can't explain. ANSEL ADAMS: A Documentary Film