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.
This iconic landscape photography by Adams is one of the 115 images included in the Voyager Golden Records â phonograph records containing sounds and images showing life and culture on Earth â which were included aboard Voyager 1 and Voyager 2 in 1977. All information for this article were sourced from Ansel Adams on Wikipedia.