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Atomic theory

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Questions 10

Answers

1
What are cathode rays?
Beam of Neutrons
Electromagnetic wave
Beam of Protons
Beam of Electrons
2
What is the atomic number of this atom?
4
5
13
9
3
The positively charged sub-atomic particle is the proton.
False
True
4
What does the atomic number of an element tell us?
The number of nuclei in one atom of the element
The number of protons in one atom of the element
The number of electrons in one atom of the element
The number of neutrons in one atom of the element
5
Who Discovered The Atomic Theory?
John Dalton
John A. Macdonald
Rudolf Clausius
Gloria Borger
6
What are unstable isotopes called?
Unstable isotopes do not exist
Angry isotopes
Radioactive isotopes
Irrational isotopes
7
Last question! Isotopes are:
atoms w/ atomic number Z but a different mass number A
atoms w/ different atomic number Z but a mass number A
atoms w/ different atomic number Z and different mass A
Same # of protons but different # of neutrons
8
Atomic Theory is the theory of what?
the evolution of the atom
the evolution of science
9
Atomic Number
24
28
51.9961
Cr
10
How was it determined that cathode rays have mass?
They were measured with a ruler
They were weighed on a scale
The rays spun a paddlewheel
The rays existed so they have mass