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1-20 Periodic Table of Elements

6th Grade Science
Across
the most abundant electropositive element in The Earth’s crust
electron-deficient, possessing a vacant p-orbital.
It’s one of the main compounds of water and of all organic matter, and it’s widely spread not only in The Earth but also in the entire Universe.
eactive and will form oxides with all other elements except helium, neon, argon and krypton
used in fertilizers for agriculture and farm production
an important chemical in water purification, in disinfectants, in bleach and in mustard gas
univalent poisonous gaseous halogen, it is pale yellow-green and it is the most chemically reactive and electronegative of all the elements
It’s the lightest solid metal, it’s soft, silvery-white, with a low melting point and reactive
used as refractory material in furnace linings for producing metals (iron and steel, nonferrous metals), glass, and cement.
It is most commonly found in milk and milk products, but also in vegetables, nuts and beans. It is an essential component for the preservation of the human skeleton and teeth.
Down
third noble gas, in period 8, and it makes up about 1% of the Earth's atmosphere
No element is more essential to life
It is light enough to float into water with which it reacts instantly to release hydrogen, which burns with a lilac flame.
used generically for these types of lights when in reality many other gases are used to produce different colors of light.
common normally colourless, odourless, tasteless and mostly diatomic non-metal gas
It is a metal that can be very harmful when humans breathe it in, because it can damage the lungs and cause pneumonia.
the first gas used for filling balloons and dirigibles
used in many industries to make millions of different products and is very important to the world economy.
a compound of many foodstuffs, for instance of common salt. It is necessary for humans to maintain the balance of the physical fluids system.
It is especially important for humans because it is part of the amino acid methionine, which is an absolute dietary requirement for us