Chapter 3 - Electrons in Atoms Flashcards
1
Q
What is meant by the first ionisation energy?
A
Is the energy needed to remove one electron from each atom in one mole of atoms of the element in the gaseous state to form one mole of gaseous 1+ ions
2
Q
Write the second ionisation energy of aluminum
A
Al+(g) -> Al2+(g) + e- 2nd I.E. = 1820 kJ mol-1
3
Q
What are the factors that influence ionization energies?
A
The size of the nuclear charge
Distance of outer electron from the nucleus
Shielding effect of inner electrons
Spin pair repulsion
4
Q
How many orbitals do s, p and d shells have?
A
s = 1, p = 3, d = 5
5
Q
What is the electronic configuration of copper? (29)
A
1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d5
6
Q
What is the electronic configuration of chromium? (24)
A
[Ar] 3d⁵ 4s¹
