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Vocab Cards

1 Atom Smallest particle into which an element can be divided and still have properties of that element
2 element substances that are building blocks of all matter
3 nucleus substances that are building blocks of all matter
4 electron shell region around the nucleus where an electron may be found
5 proton positively charged particle
6 neutron particle with a neutral charge
7 electron negatively charged particle found in the electron cloud
8 Atomic number number of protons in the nucleus of one atom
9 atomic mass average mass of one atom
10 valence electron elements with a shiny surface
11 Metal elements with a shiny surface
12 Nonmetal elements solid usually gas or brittle solid at room temp.
13 metalloid elements that have characteristics of a metal and non meta
14 group a family of elements in the periodic table that have similar physical/chemical properties
15 period a row in the periodic table arranged by atomic number
16 element substance that cant be broken down into simpler particles
17 transition elements elements in groups 3-12 in the periodic table
18 representative elements elements in groups 1 and 2 and 13-18 in the p.t.
19 ion atom or molecule that has an overall electric charge
20 isotope atoms of the same element that have different number of nuetrons
Created by: K1209937