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Atoms Review

Review of subatomic particles and elements

QuestionAnswer
smallest part of element (basic unit) atom
subatomic particle with a negative charge electron
overall charge of an atom zero (neutral)
subatomic particle with a positive charge proton
substance that can't be broken down by chemical means; usually has a 1 or 2 letter symbol element
charge of the nucleus positive
subatomic particle with no charge neutron
this is where you find electrons electron cloud
this is where you find protons and neutrons nucleus
subatomic particle that contributes to the atom's volume and reactivity electrons
subatomic particles that contribute to the atom's mass protons & neutrons
the number of protons only (identifies the element) atomic number
the sum (or total) of protons & neutrons atomic mass
change in number of electrons ion
change in the number of protons a different element
change in the number of neutrons isotope
elements on the current periodic table are arranged this way increasing atomic number
can be hammered without breaking malleable
can be made into wires ductile
are usually solids, shiny and GOOD conductors of heat and electricity metals
are usually gases, dull and POOR conductors of heat and electricity nonmetals
they have properties of metals and nonmetals and are SEMI conductors metalloids
it breaks or shatters when hammered brittle
vertical columns on the periodic table (18) group/family
he created the first periodic table Dmitri Mendeleev
horizontal rows on the periodic table (7) period
Name of Group 1 elements Alkali Metals
Name of Group 17 elements Halogens
Name of Group 2 elements Alkali Earth Metals
Name of Group 18 elements Noble Gases
this is how elements on the old periodic table were arranged increasing atomic mass
the smallest unit of a substance that keeps its chemical properties (usually a formula) molecule
subatomic particle that identifies the element protons
subatomic particles that must be in the same amount so atom can have zero charge (neutral) protons & electrons
Created by: cadetjt