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Physical Science

Physical Science Test 3

QuestionAnswer
Who used the term "atomos" to describe small particles that cannot be separated? Democritus
Who was the founder of the Modern Atomic Theory? John Dalton
Who discovered the electron? JJ Thompson
Who used electric fields to study atoms? JJ Thompson
Who used the Gold Foil experiment? Ernest Rutherford
Who discovered the nucleus Ernest Rutherford
Who discovered that electrons travel in specific orbitals? Bohr
positively charged subatomic particles that are found in the nucleus of an atom Proton
neutral subatomic particles that are found in the nucleus Neutron
negatively charged particles that are found in the space outside the nucleus electron
Where are protons and neutrons located? In the nucleus
Where are electrons located? in the outer energy levels of the atom
atoms of the same element that have different numbers of neutrons and different mass numbers isotopes
possible energies that electrons in an atom can have energy levels
visual model of the most likely location for electrons in an atom electron cloud
region of space around the nucleus where an electron is likely to be found orbitals
The main scientist that helped create the periodic table Mendeleev
rows on the periodic table periods
columns on the periodic table groups
periods tell you what about an element number of energy levels
groups tell you what about an element number of valance electrons
what states that elements are arranged by increasing atomic numbers periodic law
elements that are good conductors of heat and electric current and heat solid at room temperature metals
elements that are poor conductors of heat and electric current and are gases at room temperature nonmetals
elements with properties that fall between those of metals and nonmetals metalloids
Created by: aemiller
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