Question

訪客

第九題跟的十二題，答案是E跟A
幫忙解一下，看不太懂😅
感恩

生話點01

9) The density of silver is 10.5 g/cm?. A piece of silver that occupies avolume of 63.l cm3 would
haveamass of               8-

A) .445                B) 23.6               C) 112                D) 2.25                E) 663

10) Which species is an isotope of 39Cl?
A) 39Ar         B) 36Cl-        C) 80Br         D) 35452-         E) 40Ar+

11) Which pair of elements below should be the most similar in chemical properties?
A) CandO            B) Band As          C) Cs and He         D) Kand Kr           E)Iand Br

12) The gold foil experiment performed in Rutherford's lab
A) led to the discovery of the atomic nucleus
B) utilized the deflection of beta particles by gold foil
C) proved the law of multiple proportions
D) was the basis for Thomson's model of the atom
E) confirmed the plum-pudding model of the atom

人

人全全y有1

 

10)

11)

12)

Answer 1

言冰

12.拉塞福金箔實驗 發現原子核

Answer 2

Sanbert Wong

9）銀的密度是10.5g/cm³
質量mass=密度×體積
12) 不知道😅