Atomic Number 1 To 30

For example: Hydrogen has three isotopes – 1 H 1, 1 H 2 and 1 H 3 having mass number 1, 2 and 3 respectively. Naturally occurring hydrogen contains about 99.985% of protium, 0.014% of deuterium and 0.001% of tritium. Therefore the atomic mass of hydrogen is 1.00784 amu. The atomic mass of an element element is measured in atomic mass unit. Adding up some subsets of its divisors (e.g., 5, 10 and 15) gives 30, hence 30 is a semiperfect number. 30 is the largest number such that all coprimes smaller than itself, except for 1, are prime. A polygon with thirty sides is called a triacontagon. The icosahedron and the dodecahedron are Platonic solids with 30 edges.

Atomic number 1 - a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest.
Random Element by Atomic Number (1-30) Quiz instructions Quiz by Oganesson123. Profile Quizzes Subscribed Subscribe?
Study Flashcards On Periodic Table Elements by atomic number (1-20) at Cram.com. Quickly memorize the terms, phrases and much more. Cram.com makes it easy to get the grade you want!

The title is specific enough, but if that is not good for you, then I will say a little more. This set only contains the first thirty elements of the periodic table. The main things are the number of the element, symbol and the proper name. This does not contain the atomic mass of each element. If you are looking to learn the atomic masses of each element, this is not the set of flash cards for you. Anyway, I hope you enjoy using my flash cards.

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