Week 1 Flashcards
1
Q
What is the average atomic weight of Cr, which has 4 isotopes?
- 34% of 50Cr, 49.9460 amu
- 79% of 52Cr, 51.9405 amu
- 50% of 53Cr, 52.9407 amu
- 37% of 54Cr, 53.9389 amu
A
2
Q
What is the difference between the atomic mass and the atomic weight?
A
3
Q
Give the electronic configurations for the following:
Al, Al3+, O, O2- and Cu (Atomic numbers Al= 13, O= 8, Cu= 29)
A
4
Q
Describe the differences in electron behaviour between ionic, covalent and metallic bonding.
A
5
Q
Calculate the percentage ionic character of the interatomic bonds in
a) TiO2 , given that XTi = 1.5 and XO = 3.5
b) MgCl2 , given that XMg = 1.2 and XCl = 3.0
A
