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Unformatted text preview: 2.1. A 30441 Orin; is used to form a gasﬁghl seal in a
highvacuum chambet. Th: ring is fanned from a
80mm length at 15mm4i‘iamelcr wilt Calculate
the number of gnld alums in the (Swing. )V r. 3
[E k‘/ VG‘S)‘ 1‘12“” 3’4“»: ‘80“ M
W i—Swa‘m 1'
x ( a? J x o. 99.2: ”mm
”£9734“ = E 53310}, W 2.10. The orbital elcctmns of an atom can be cjecled by
txposure lo a beam of clectromagnetic radiation.
Speciﬁcaiiy. m electron can be ejected by a photon
with energy smaller Ihan or equal to the chateau“:
binding energy Given that the. phaion cnugy (E)
is equal to hc/A, where h is Pianck‘s canstant. c
tbs: speed of light. and A the waveicngtb. calming
the maximum wavelength of radiation {correspond‘
ing to the minimum energy) uncanny IO eject I 1:
electron from a C ‘1 alum. (Se: ﬁgurc 2.3.) Fun F304. 2.3,, [5}: 213.94%
= (0.“ :4 nod’msk’maum is. A)
(73.3. 9: VII J/G. 2421a,": V) = 4.57:1!0' 0v! 1 Jun/'O'tw a 4. 57am 2.15 So In“. we hm conccuumd on the coulomb‘ac Iowa at
autism between ions. But like inns npni nab can. A neuuweighbur par of Na" ion: in Figure 2.5 are
manned by : dismiss of flat). When a; is (kind in
Him: 2.7" Calcuiu: the mama1c (are: of “punish
Mum “m n pm oflike inns. [E F5.“ _, Amiga”) G 5 _.. (Ma’ v... /c2(+i)éJma"’c)m)faJs xm“”c) (2)(D.378 xia'qm)a = — l.47x/0"N 2.1; Calculus the coulombic tom of autumn human C31?
and 01" in C40. which has the. NlCltyp: mum; Fm ﬁrrhi‘w 5” 12:3”; 0./0£ AM i {03' 50 A’s2h“. '77: an, an: raar ”To" = Odﬁﬁaufal‘JJhml 0.335.... F; = .. (7ND,Vu/C)G£ﬁ.£wf'IC)(1)(aﬂwa’”c)
M
(0.23! 2:104... ) '1 ’ #«3 :10 "A! PP 2 6 Calculate. the minimum radius ratio for a coordination number of
{a} 4 and (b) 6. (54:: Example 2.7.) m .. Inna 'R 5‘ [035‘ {rte Fame. 2‘”) 8:». 49.1.1) .3...
3 r+’R 6.3:“ r + an“?  ‘R (A)  5 6:45“
3.3.. 45's—L
HR 0.197 r 4 9.70712 a?
3M3, ﬁh‘}
,§ 1:: 0.414 Q6: Calculate the molecular weight of a polyethylene molecule with n=5 00. H 5/
véwL
‘6’ 3 n “137/0
H H ...
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 Spring '10
 Derkins

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