5.1 The Nuclear Atom

Transcription

1 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at Th Nuclar tom Qustio Papr Lvl IGSE Subjct Physics (0625) Exam oard Topic Sub Topic ooklt ambridg Itratioal Examiatios(IE) tomic Physics 5.1 Th Nuclar tom Qustio Papr Tim llowd: 30 miuts Scor: /25 Prctag: /100 Grad oudaris: * E U >85% 75% 60% 45% 35% 25% <25%

2 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 1 uclus of amricium 95 m mits a α-particl to form a uclus of ptuium (Np). Which quatio rprsts this dcay? m Np α m Np - α m Np -1α m Np α crtai lmt has svral isotops. Which statmt about ths isotops is corrct? Thy must hav diffrt umbrs of lctros orbitig thir ucli. Thy must hav th sam umbr of utros i thir ucli. Thy must hav th sam umbr of uclos i thir ucli. Thy must hav th sam umbr of protos i thir ucli. 3 vry importat xprimt icrasd scitists udrstadig of th structur of mattr. I th xprimt, particls scattrd as thy passd through a thi mtal foil. Which particls wr usd, ad to which coclusio did th xprimt lad? particls alpha particls alpha particls bta particls bta particls coclusio mattr is mad up of atoms atoms hav a vry small uclus mattr is mad up of atoms atoms hav a vry small uclus 4 low ar th symbols for fiv diffrt uclids uclid 1 uclid 2 uclid 3 uclid 4 uclid 5 Which two uclids ar isotops of th sam lmt? uclid 1 ad uclid 2 uclid 2 ad uclid 3 uclid 2 ad uclid 5 uclid 4 ad uclid 5

3 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 5 low ar four statmts about isotops of a crtai lmt. Which statmt about th isotops must b corrct? Thy ar radioactiv. Thy ar ustabl. Thy hav th sam umbr of utros. Thy hav th sam umbr of protos. 6 Which diagram rprsts a xprimt that providd vidc for th uclar atom? α-particl β-particl gold uclus gold uclus α-particl β-particl gold uclus gold uclus

4 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 7 Th scattrig of α-particls by a thi mtal foil supports th uclar modl of a atom. Why ar α-particls usd rathr tha utros? bcaus thy always travl mor slowly bcaus thy ar havir bcaus thy ar largr i diamtr bcaus thy hav a positiv charg is a uclid of carbo. What is th compositio of o uclus of this uclid? utros protos uclid has th symbol N 10. What is th proto umbr of a uclus of this uclid? Th uclus of a amricium atom cotais 146 utros ad 95 protos. It dcays by mittig a α-particl. How may utros ad how may protos rmai i th uclus wh this form of amricium dcays?

5 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 11 Which statmt is corrct for th uclus of ay atom? Th uclus cotais lctros, utros ad protos. Th uclus cotais th sam umbr of protos as utros. Th uclus has a total charg of zro. Th uclus is vry small compard with th siz of th atom. 12 Th uclid symbol for radioactiv poloium is Po. uclus of this typ of poloium mits a α-particl. What is th proto umbr (atomic umbr) of th uclus aftr it has mittd th α-particl? Th uclid otatio for radium-226 is Ra. How may lctros orbit th uclus of a utral atom of radium-226? radioactiv uclus cotais 128 uclos. It mits a β-particl. How may uclos ar ow i th uclus? Th uclid otatio for radium-226 is Ra. How may lctros orbit th uclus of a utral atom of radium-226?

6 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at uclid has th symbol 6. How may protos ar thr i o uclus of this uclid? lithium uclus cotais 3 protos ad 4 utros. What is its uclid otatio? Li 3Li 3Li 4Li 18 particular uclid of chlori ca b rprstd by th symbol show. 37 l 17 How may lctros ar thr i a utral atom of this uclid? uclid is rprstd by th symbol P. Q How may utros ar i o uclus of th uclid? P Q P Q P Q

7 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 20 Which statmt about th ucli of all atoms is corrct? Thy ar vry small compard with th siz of th atoms. Thy always cotai th sam umbr of protos as utros. Thy cotai lctros, utros ad protos. Thy hav a total charg of zro. 21 uclid of substac has th symbol How may lctros ar thr i a utral atom of substac? uclus of hlium has th symbol 2H. 3 Which diagram rprsts a atom of 2H? p p p p p ky p = proto = utro = lctro p

8 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 23 Which diagram could rprst th structur of a utral atom? ky utro proto lctro 24 Which statmt about a utral atom of Ra is corrct? It has a qual umbr of utros ad protos. It has mor lctros tha utros. It has mor lctros tha protos. It has mor utros tha protos.

9 Sav My Exams! Th Hom of Rvisio For mor awsom GSE ad lvl rsourcs, visit us at 25 atom of th lmt lithium has a uclo umbr of 7 ad a proto umbr of 3. Which diagram rprsts a utral atom of lithium? ky = a utro = a proto = a lctro (ot to scal)