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2. Periodic trends - Wikipedia

   en.wikipedia.org/wiki/Periodic_trends

   [10] [11] [12] As one moves from left-to-right across a period in the modern periodic table, the ionization energy increases as the nuclear charge increases and the atomic size decreases. The decrease in the atomic size results in a more potent force of attraction between the electrons and the nucleus. However, suppose one moves down in a group.

3. Periodic sequence - Wikipedia

   en.wikipedia.org/wiki/Periodic_sequence

   A (purely) periodic sequence (with period p), or a p-periodic sequence, is a sequence a 1, a 2, a 3, ... satisfying . a n+p = a n. for all values of n. [1] [2] [3] If a sequence is regarded as a function whose domain is the set of natural numbers, then a periodic sequence is simply a special type of periodic function.

4. Periodic function - Wikipedia

   en.wikipedia.org/wiki/Periodic_function

   This definition of periodicity can be extended to other geometric shapes and patterns, as well as be generalized to higher dimensions, such as periodic tessellations of the plane. A sequence can also be viewed as a function defined on the natural numbers, and for a periodic sequence these notions are defined accordingly.

5. Types of periodic tables - Wikipedia

   en.wikipedia.org/wiki/Types_of_periodic_tables

   1915 — William Ramsay, in his book The Gases of The Atmosphere, included a periodic table with a fold (or flap) that can be moved from page 220 to 221. [ 87 ] [ 88 ] 1950 — McCutchon published a short table in which the d- and f-blocks were depicted as folding flaps positioned on top of the s- and p-blocks.

6. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Audible (service) - Wikipedia

   en.wikipedia.org/wiki/Audible_(service)

   Audible is an American online audiobook and podcast service that allows users to purchase and stream audiobooks and other forms of spoken word content. This content can be purchased individually or under a subscription model where the user receives "credits" that can be redeemed for content monthly and receive access to a curated on-demand library of content.

8. Our 21 Best 30-Minute Soups That Are Creamy & Comforting - AOL

   www.aol.com/21-best-30-minute-soups-130000239.html

   In this creamy radish soup recipe, radishes are sautéed and pureed with potato, creating a velvety, healthy soup. Cooking radishes also tones down any bitterness while leaving plenty of sweet ...

9. Learn more about AOL's Free Email with AOL Mail | AOL Products

   www.aol.com/products/utilities/aol-mail

   Keep your inbox clutter-free with automated tools. See all emails based on topic (e.g. photos), with contextual bonus features with the new Views functionality. Or, use advanced filters to sort ...