scientists Flashcards
1
Q
date of jj Thomson
A
1897
2
Q
date of neils Bohr
A
1913
3
Q
date of rutherford
A
1911
4
Q
date of James Chadwick
A
1932
5
Q
date of Jon Dalton
A
1800
6
Q
jj Thomson ideas
A
atoms contain negative and positive charged subatomic particles raisins in a muffin
7
Q
rutherfords ideas
A
named positive charged particles protons in the nucleus fruit with pit
8
Q
bohrs ideas
A
electrons move in certain orbit planet model
9
Q
scientist ideas in 1920s
A
electrons can be anywhere placement is by energy
10
Q
chadwicks ideas
A
discovered neutron
11
Q
why did atomic theory change over time
A
because people learned new info and did new experiments
12
Q
what are three main particles in an atom
A
proton neutron electron
13
Q
why do atoms have no electrical charge
A
because the protons and electrons balance out
