M3: L-1 Flashcards
1
Q
What did Rutherford discover about the atom in 1911?
A
Almost all of the mass is in the nucleus / protons + neutrons and electrons orbit them
2
Q
What did Schroder get help to show in 1926?
A
Electrons exist in orbitals of defined energies
3
Q
What is the order of increasing energies of the first 9 orbitals
A
1s, 2s,2p, 3s, 3p, 4s, 3d, 4p, 5s
4
Q
What is a covalent bond?
A
A shared pair of electrons between two atoms
5
Q
What is the 5 step procedure for drawing Lewis structures
A
- Count the valence electrons for each atom
- Assemble the bonding framework using single covalent bonds
- Place 3 non-bonding pairs of electrons on each outer atom
- Assign the remaining valence electrons to inner atoms
- Minimise formal charges on all atoms
6
Q
What is a molecule called/ said to have when more than one Lewis structure can be drawn?
A
Resonant/ resonance