PNE quiz (hai julia) Flashcards
1
Q
negatively charged particle
A
electron
2
Q
positively charged particle
A
proton
3
Q
neutral particle
A
neutron
4
Q
discovered in 1897 by JJ Thompson
A
electron
5
Q
Earnest Rutherford, 1910
A
proton
6
Q
James Chadwick, 1932
A
neutron
7
Q
Oil drop experiment by Robert Milikan in 1909
A
electron
8
Q
discovered from positive ray reaserch
A
proton
9
Q
radius is smaller than an electron
A
protons, neutrons
10
Q
interact to keep the nucleus intact
A
proton, neutron
11
Q
1A=
A
10^-10
12
Q
radius is 10^-5 A
A
electron
13
Q
are all identical
A
electrons
14
Q
charge is equal and opposite to an electron
A
proton
15
Q
no electrical charge
A
neutron
16
Q
smallest unit of electrical current ever identified
A
electron
17
Q
spectrophotometer
A
neutrons, protons
18
Q
gold foil experiment
A
protons (identified positive particles in central region)
19
Q
energy levels are made up of
A
electrons
