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Atomic theory
The scientific theory that matter is made up of atoms
Erwin Schrödinger’s Model
The electron cloud model; our current understanding of atoms
Bohr’s model is ___
Inaccurate
Atoms are the ___
basic building blocks of all matter
The nucleus of an atom is ___
dense
What two particles of an atom are inside the atomic nucleus?
protons and neutrons
What is in the space outside of the nucleus?
Electrons
Atoms are held together by ___
electromagnetic forces
Properties of atoms are based on ___
the atomic number and arrangement of parts inside an atom
What are the 3 subatomic particles in an atom?
Protons, neutrons, and electrons
What is the mass of 1 proton (in AMU)?
1 AMU
What is the mass of 1 neutron (in AMU)?
1 AMU
What is the mass of 1 electron (in AMU)?
1/2000 AMU or 0.00055 AMU
What is the charge of a proton?
Positive
What is the charge of a neutron?
Neutral
What is the charge of an electron?
Negative
The organization of the periodic table can be used to ___
predict characteristics and tendencies of elements
What are the vertical columns in the periodic table called?
Groups
What are the horizontal rows in the periodic table called?
Periods
What is a similarity of the elements in a group?
Same number of valence electrons and similar chemical properties
What is a similarity of the elements in the same period?
the same number of energy levels
What is the theory that says that atoms & molecules are always in motion and have kinetic energy that increases when raising the temperature?
the kinetic molecular theory
Where are metals on the periodic table?
the left
Where are nonmetals on the periodic table?
the right
Where are metalloids on the periodic table?
the “staircase”
Note 
Flashcard (66)