Summer Chemistry Flashcard

Subatomic
smaller than or occuring in an atom
Ernest Rutherford

-“empty space model”

 

 

Alpha Particle

[image]

 

Atomic Number

-number of protons in the nucleus of an atom

-determines chemical properties of an atom

isotope
atoms of the same element with different number of neutrons
Deflection
when something changes direction as a result of hitting something else
concentrated
clustered or gathered together closely
atomic mass
neutrons minus atomic number
Calculating amount of neutrons in an atom
subtract atomic mass from atomic number or vice versa

what is used to calculate atomic mass on the periodic table?

 

-abundance in nature

-masses of different isotopes

Ion
atoms or groups of atoms with extra or missing electrons
anions

-atoms with negative charge

-atoms with extra electrons

cations

-atoms with a positive charge

-atoms with missing electrons

Electron Configurations
electron arrangement within an atom
neils bohr

-early scientist from 1900s

-believed that electrons move in orbits around the nucleus of the atom similar to how planets orbit the sun

HE WAS WRONG

basics of quantum mechanics

-when energy is added to an atom, electrons within the atom jump to higher energy levels

 

-when electrons go back to its original energy level, they release the energy that they previously absorbed

wavelength

distance required for one complete wave to occur

(measured in meters)

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