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Q 1/31
Score 0
Developed the atomic theory. He said that all elements were made of unique atoms that were different from atoms of other atoms.
30
Dalton
Q 2/31
Score 0
In his model of the atom, electrons travel around the nucleus in specific energy levels.
30
Bohr
31 questions
Q.
Developed the atomic theory. He said that all elements were made of unique atoms that were different from atoms of other atoms.
1
30 sec
Q.
In his model of the atom, electrons travel around the nucleus in specific energy levels.
2
30 sec
Q.
Proposed that the electrons of an atom were embedded in a ball of positive charge called the "plum pudding" model of the atom.
3
30 sec
Q.
He established that the nucleus was: very dense, very small and positively charged. He also assumed that the electrons were located outside the nucleus.
4
30 sec
Q.
Rutherford's experiment that led to discovery of the positively charged nucleus
5
30 sec
Q.
According to this model, electrons are located in orbitals which are regions around the nucleus where electrons are likely to be found.
6
30 sec
Q.
Smallest unit of an element that retains the properties of that element.
7
30 sec
Q.
Pieces of matter that make up atoms.
8
30 sec
Q.
Negatively charged subatomic particle that circles the nucleus of an atom.
9
30 sec
Q.
Positively charged subatomic particle that is a part of the nucleus.
10
30 sec
Q.
Neutral subatomic particle that is a part of the nucleus.
11
30 sec
Q.
"Center" of the atom that is made up of protons and neutrons.
12
30 sec
Q.
Region surrounding the nucleus where electrons are found.
13
30 sec
Q.
Indicates the number of protons found in an atom of a specific element.
14
30 sec
Q.
Indicates the number of protons and neutrons found in an atom of a specific element.
15
30 sec
Q.
Weighted average of the mass numbers of the isotopes of an element.
16
30 sec
Q.
Different versions of an element that have the same number of protons, BUT different number of neutrons.
17
30 sec
Q.
Different version of an element which has same number of protons, but different number of electrons creating a charged particle
18
30 sec
Q.
1 amu
19
30 sec
Q.
1 amu
20
30 sec
Q.
0
21
30 sec
Q.
Atoms have different masses and combine to form different substances.
22
30 sec
Q.
Atoms have small negative charges embedded in a positive matrix. "Plum Pudding"
23
30 sec
Q.
Atoms have a small, dense, positive center (nucleus) surrounded by an "empty space" where negative charges are located.
24
30 sec
Q.
Atoms have levels surrounding the nucleus where electrons are found. Levels can hold different amounts of electrons depending on their distance from the nucleus.
25
30 sec
Q.
Electrons in the atom move fast and random so that their exact location can't be identified. Regions where there is a high probability of finding an electron.
26
30 sec
Q.
Why has our model of the atom changed over time?
27
30 sec
Q.
What was the evidence Rutherford found?
28
30 sec
Q.
What was difference between plum pudding model and nuclear model of the atom?
