Which of the following was NOT included in Dalton's Atomic theory?

Atoms contain a nucleus which is very dense

How does nuclear decay occur?

Unstable nuclei lose energy by emitting radiation

Which is true regarding nuclear equations?

Mass number and atomic number are conserved

What did Millikan’s oil droplet experiment prove about the atom?

The existence of positively charged material

What did Rutherford's experiment prove about the atom

Atoms contain a positively-charged nucleus

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The Structure of the Atom

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Historical development of the atom, atomic number, mass number, atomic mass, radioactivity

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Questions 15

Answers

1
The weighted average mass of the isotopes of an element
Atomic number
Atomic mass
Isotope
Mass number
2
When the number of protons in an atom changes then what else changes about that atom?
Its mass
Its charge
Its element
All of the above
3
The number of protons in an atom
Atomic number
Isotope
Mass number
Atomic mass
4
Which of the following has a mass of 4 and a charge of 2+?
Gamma ray
Neutrino
Beta particle
Alpha particle
5
High energy radiation that possesses no charge
Beta particle
Gamma ray
Alpha particle
Neutrino
6
An electron with a 1- charge
Beta particle
Neutrino
Gamma ray
Alpha particle
7
Which of the following was NOT included in Dalton's Atomic theory?
Atoms contain a nucleus which is very dense
Atoms cannot be divided into smaller particles
In a reaction atoms are separated, combined, or rearranged
All atoms of a given element are identical
8
How does nuclear decay occur?
Unstable nuclei gain energy by absorbing radiation
Unstable nuclei lose energy by absorbing radiation
Unstable nuclei gain energy by emitting radiation
Unstable nuclei lose energy by emitting radiation
9
Which is true regarding nuclear equations?
None of the above
Mass number and atomic number are conserved
Mass number is conserved
Atomic number is conserved
10
What did Millikan’s oil droplet experiment prove about the atom?
The existence of positively charged material
Protons and neutrons exist in the nucleus
The size of the atom
It was mostly empty space
11
Which sub atomic particle was discovered in the cathode ray experiment?
Neutrino
Proton
Neutron
Electron
12
What did Rutherford's experiment prove about the atom
None of the above
Atoms contain a negatively-charged nucleus
Atoms contain a neutral particle with mass equal to a proton
Atoms contain a positively-charged nucleus
13
Contains two protons and two neutrons
Neutrino
Beta particle
Gamma ray
Alpha particle
14
This sum of the number of protons and neutrons in an atom
Atomic mass
Mass number
Isotope
Atomic number
15
Atoms with the same number of protons but different number of neutrons
Mass number
Atomic mass
Isotopes
Atomic number

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