Atoms and atomic structure Flashcards Preview

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Flashcards in Atoms and atomic structure Deck (8)
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1
Q

describe shells, subshells and orbitals

A
shells = principle energy levels
subshells = spdf
orbitals = within subshells, contain 2 electrons
2
Q

how many electrons in a shell

A

2n^2

3
Q

exceptions?

A

chromium: 3d5 4s1
copper: 3d10 4s1

4
Q

how do you figure out resonance structures?

A

individual atoms must have lowest formal charge AND sum must be the same.

5
Q

describe resonance structures

A

when there is more than one way to minimise formal charge. In reality, electrons are delocalised between atoms and all bonds involved are the same length.

6
Q

trigonal planar molecular geometries?

A

trigonal planar and bent. (120*)

7
Q

tetrahedral molecular geometries?

A

tetrahedral, trigonal pyramidal, bent (109.5*)

8
Q

describe valence shell electron pair repulsion model

A

valence electron pairs are situated as far away from each other as possibe