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Atomic Structure Questions and Answers 100% Verified
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Exam of 4 pages for the course Atom at Atom (Atomic Structure)
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Atomic StructureAtom - answer the smallest particle of an element that still has the properties of that
element.
Proton - answer positive particles in the nucleus
Neutron - answer neutral particles in the nucleus with protons
Electron - answer negative particles outside of the nucleus in the electron cloud
Quarks - answer smallest particle that makes up p+ and n
valence electrons - answer Electrons on the outermost energy level of an atom
Draw a timeline of the discovery of the structure of the atom. Include date, name, and a
brief summary of each discovery or model. - answer Democritus- first to name the atom
John Dalton- Sphere model, atom is a solid sphere that can't get any smaller, elements
are made of atoms have the same mass and compounds are atoms of different
elements combine.
Dmitri Mendeleev- developed the first periodic table, organized by atomic mass
JJ Thomson- Plum pudding model, the atom is divisible, it is positively charged sphere
with negative particles embedded throughout.
Ernest Rutherford- Nuclear model, gold foil experiment, mass of an atom and its
positively charged particles were in the nucleus, with low mass negatively charged
particles surrounding it.
Henery Moseley- discovered the number of protons is unique to each element arrange
the periodic table.
Niels Bohr- Bohr model, electrons are negative particles travel in orbits around the
nucleus that is made of positive protons and neutrons.
Schrodinger and Heisenberg- Electron cloud, nucleus is surrounded by an electron
cloud that is divided into shells, but do not travel in fixed orbits.
Differentiate between the Bohr Model and the Electron Cloud Model. - answer The
difference between the Bohr model and the electron cloud is that the Bohr model
electrons travel in fixed orbits. While a electron cloud the electrons are divided into
shells and do not travel in fixed orbits.
Summarize our current understanding of atomic structure. Include the two parts, where
the three particles are located, and where the mass and volume in an atom mainly exist.
- answerAtom's are made up of nucleus and electron cloud is where the volume comes
from.
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