History Of Periodic Table And Electron Configurations Flashcards Preview

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Flashcards in History Of Periodic Table And Electron Configurations Deck (11):
1

Dmitri Mendeleev

•Russian chemist
•developed the periodic table in 1869

2

Rows

Periods

3

Columns

Groups

4

Electrons

•do not travel around nucleus in orbits
•exist in an area of 3 dimensional space outside of nucleus (electron cloud)

5

Orbital

Volume of space where an electron with a specific energy is likely to be found

6

Principal quantum number

(n) tells size of an orbital and largely determines its energy

7

Angular momentum quantum number

(I) tells shape of orbital

8

Magnetic quantum number

(m) describes the direction that the orbital projects into space

9

Spin quantum number

•Another quantum number that had to be added to describe electron spin
•the two values: 1/2 and -1/2

10

S orbitals

•Spherical
•contain up to two electrons

11

P orbitals

•Dumbbell shaped
•contain up to six electrons