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Periodic table

TermDefinition
Families also called groups, are vertical columns of elements on the periodic table; they are usually numbered 1
Metalloids Boron (B), silicon (Si), germanium (Ge), arsenic(As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non
Alkali Metals Lithium, sodium, potassium, rubidium, cesium, and francium are Alkali metals. Hydrogen is on the same column, but it is not an Alkali metal. They have low melting and boiling points. They are very soft. They have low densities. Apart of Group one.
Alkaline Earth Metals Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr),barium (Ba), and radium (Ra) are Alkaline Earth metals. The properties of Alkaline Earth Metals are shiny, silvery
Transition Metals Groups three through twelve on the periodic table are transition metals. They are good conductors of heat and electricity. They can be put into shape easily. They are less reactive than alkali metals such as sodium.
Non metals Hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon, bromine, carbon, phosphorus, sulfur, selenium, and iodine are the Nonmetals. Non metals are weak and Dull. They have a low density.
Noble gases Do not react. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and Ununoctium (Uuo) make up Noble gases. They are apart of group 18. The noble gases are colorless, odorless, tasteless, and nonflammable under standard conditions.
Halogens Group 17 in the periodic table is fluorine, chlorine, bromine, iodine. and astatine. Chlorine, bromine and iodine form negatively charged ions that are part of salts found in the sea water. The last element of the group,astatine, is radioactive in nature.
Atomic mass The average sum of the number of protons and electrons in an atom.
Atomic number is equal to the number of protons and It is a whole number. it is always the same for a given elements and the elements on the periodic table are organized by increasing atomic number.
Created by: TagV
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