2 Periodic Elements

Hydrogen is one of the lightest elements and its the most abundent in the atmostphere. Hydrogen makes up about 90% of the universe weight. It is very valuable to life and in orgranic compounds. Hydrohen is the lightest gas it was used in air ballons but it was too dangerous because of fire dangers. It burns in air to form only water as waste product. The atomic number of hydrogen is 1 and its weight is 1.00794. It is in the first group which are the alkali metals but hydrogen isnt one of them its just part of the group. Its located in the s block and is a non metal.

Neon is one of the noble gases, which means it has 7 valance electrons in the outer shell and it more stable than the other families. In a vacuum discharge tube, neon glows reddish orange. Out of all the rare gases the discharge of neon is the most intense at regular currents. It presents 1 part in 65000 in the atmosphere. Liquid neon has over 40 times more refrigerating capactiy than liquid helum, and more  than 4 times that of liquid hydrogen. Neon symbol is Ne, its atmoic number is 10. Neon atomic weight is 20.1797. Neon is a non metal and it is located in the p block , also group 18 which we call the noble gases.