Question

#1: What did Robert Millikan's oil drop experiment prove?

A. Atoms are composed of positive charges.

B. It determined the actual mass of the electron.

C. Matter can be conserved.

D. Atoms can be neither created nor destroyed.
**My answer: B.

Answer 1

#2: J.J. Thomson's cathode-ray tube experiment showed which of the following?

A. Electrons are in a cloud surrounding positively charged particles.

B. Atoms consist of at least some negatively charged particles.

C,. Matter can be neither created nor destroyed.

D. Atoms are small individual spheres.
**My answer: B
(but I'm not 100% sure..)

Answer 2

#3: An electrically neutral atom of beryllium has four protons. What other facts do you know for sure about this atom?

A. There are four neutrons in the nucleus.

B. There is a charge of +4 on an atom of beryllium.

C. There is a charge of 4 on an atom of beryllium.

D. There are four protons in the nucleus.
**My answer: A.

Answer 3

#1 should be charge of the electron

Answer 4

#4: Which scientist developed a model of the atom that looked like a nucleus surrounded by electrons?

A. J.J. Thomson

B. Ernest Rutherford

C. John Dalton

D. Lucretius
***my answer: A. jj thomson

(not very sure tho)

Answer 5

wait so what is the answer to #1 then?? thats not an answer choice :( and are 2-4 right??

Answer 6

#5: Which scientist discovered the existence of a center to the atom?

A. Ernest Rutherford

B. Antoine Lavoisier

C. John Dalton

D. J.J. Thomson
***My answer: A. Ernest Rutherford

Answer 7

#3 none of them are really true, most abundant isotope of Be has 5 neutrons..

Answer 8

well you can say D is true, but thats just re-stating what the question said

Answer 9

#4 is B

Answer 10

#5 is A

Answer 11

wait I'm a bit confused now lol :P so what are the correct answers for 1-5??
#1--??
#2--??

etc... ?

Answer 12

which you got right :)

Answer 13

#2 was right

Answer 14

#1 none really, he worked with the CHARGE not the mass of the electron..

Answer 15

maybe you made a mistake while typing it?

Answer 16

but i have to choose an answer... which one would it be then??

Answer 17

no i don't think i did.... here is the question again...
#1: What did Robert Millikan's oil drop experiment prove?

A. Atoms are composed of positive charges.

B. It determined the actual mass of the electron.

C. Matter can be conserved.

D. Atoms can be neither created nor destroyed.

Answer 18

#1 B

Answer 19

okay what about #3 and #4??

Answer 20

#3 is D .. #4 is B

Answer 21

oaky awesome ;) thanks!! :D

Answer 22

no prob(:

Answer 23

wait just making sure, so 1=B
2=B
3=D
4=B
5=A
??? is that correct??

Answer 24

yes

Answer 25

yay!! :D

Answer 26

wait just making sure, so 1=B
2=B
3=D
4=B
5=A
??? is that correct??