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structure of atoms


atoms the smallest piece of matter that still retains the properties of element
nucleus the smallest positively charged center of the atom
electron cloud the area around the nucleus where electrons are usually found.
perodic table elements are arranged by increasing atomic number and changes in physical and chemical properties
Dmitir Mendeleer order elements in order or mass and discovered patterns
henry mosely changed the order to increasing atomic number
melleable metals can be hammered or rolled into sheets
ductile metals can be drawn into wires
mrtallic bounding outer level( violence) electrons are not hold closely and more freely in a cloud around the positively charged nucleus
alkala metals good conductors softer, malleable and very reactive
alkaline earth metals have 2 violence electrons not found in elemental from nature
non metals usually gases or brittle solids at room temp
diatomic a molecule made of 2 atoms who share electrons
hydrogen water forming shares electrons in a strong(co-valent) bond
halogens have 7 outer electrons very reactive
Created by: raised_123