Hydrogen | 1.0079 | H | 1 |
Hydrogen is a chemical element with symbol H and atomic number 1. With a standard
atomic weight of 1.008, hydrogen is the lightest element on the periodic table. -- Wikipedia |
Helium | 4.0026 | He | 2 |
Helium is a chemical element with symbol He and atomic number 2. It is a
colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas
group in the periodic table. Its boiling point is the lowest among all the elements. -- Wikipedia |
Lithium | 6.941 | Li | 3 |
Lithium is a chemical element with symbol Li and atomic number 3. It is a soft,
silvery-white alkali metal. Under standard conditions, it is the lightest metal and the
lightest solid element. -- Wikipedia |
Beryllium | 9.0122 | Be | 4 |
Beryllium is a chemical element with symbol Be and atomic number 4. It is a
relatively rare element in the universe, usually occurring as a product of the spallation of
larger atomic nuclei that have collided with cosmic rays. -- Wikipedia |
Boron | 10.811 | B | 5 |
Boron is a chemical element with symbol B and atomic number 5. Produced entirely
by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a
low-abundance element in the Solar system and in the Earth's crust. -- Wikipedia |
Carbon | 12.0107 | C | 6 |
Carbon is a chemical element with symbol C and atomic number 6. It is nonmetallic
and tetravalent—making four electrons available to form covalent chemical bonds. It belongs
to group 14 of the periodic table. -- Wikipedia |
Nitrogen | 14.0067 | N | 7 |
Nitrogen is a chemical element with symbol N and atomic number 7. It was first
discovered and isolated by Scottish physician Daniel Rutherford in 1772. -- Wikipedia |
Oxygen | 15.9994 | O | 8 |
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of
the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing
agent that readily forms oxides with most elements as well as with other compounds. -- Wikipedia |
Fluorine | 18.9984 | F | 9 |
Fluorine is a chemical element with symbol F and atomic number 9. It is the
lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard
conditions. -- Wikipedia |
Neon | 20.1797 | Ne | 10 |
Neon is a chemical element with symbol Ne and atomic number 10. It is a noble gas.
Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about
two-thirds the density of air. -- Wikipedia |