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Science Review

terms and definitions

TermDefinition
proton a positively charged particle found in the nucleus of the atom
neutron an uncharged particle found in the nucleus of the atom
electron a negatively charged particle found in an electron cloud orbiting around the nucleus of an atom
atomic number number of protons in the nucleus of an atom
atomic mass number protons plus neutrons
atomic mass average mass of all an elements isotopes
metals 1. Malleable 2. Conduct heat well 3. conduct electricity well 4. solids at room temperature 5. they are shiny
non metals 1. not malleable 2. do not conduct heat well 3. do not conduct electricity well 4. they are dull 5. they are gases at room temperature
metalloids have properties of metals and non metals
far l metals
far r non metals
middle metalloids also known as transition metals from sections 3-12
ion is formed when an atom loses or gains an electron
isotope is an atom of the same element but has a different number of neutrons
what are the most reactive groups 1 and 17
what is the least reactive group 18- it doesn't like to form any type of ion
columns groups
rows periods
alloy the combination of two or more atoms
metalloids elements that have properties of both metals and non metals
reactive a term that indicates how likely ans element is to undergo a chemical change
def. of metal elements that conduct heat and electricity well
Created by: kgupta
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