Henry Mosely did which of the following?

The number of protons in the nucleus equals atomic number

A valence electron is ...

any electron in the outer most shell

Empedocles believed matter was

made of earth, air, fire and water

Quantum theory explains that ...

Particles sometimes exhibit wave properties, It is impossible to determine the exact location of an electron

Which is NOT part of Dalton's atomic theory?

Atoms can be created through chemical reactions

Groups or families have...

Similar chemical and physical properties

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Chemistry Review

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Answers

1
Henry Mosely did which of the following?
The number of protons is equal to the number of protons and neutrons
Electrons have a negative mass
The number of protons in the nucleus equals atomic number
The number of electrons is always different
2
Mixtures are defined as...
Impure substances
Molecules
Homogenous
Elements
3
Rutherford discovered the
Nuetron
atom
electron
proton
4
Mass number is equal to...
Protons + Neutrons + Electrons
Electrons + Protons
Electrons and Neutrons
Protons + Nuetrons
5
Charge of protons, neutrons and elections...
+ / zero / -
- / zero / +
+ / + / +
No charge
6
A valence electron is ...
any electron in the first shell
electrons in the noble gases
any electron in the outer most shell
the total number of electrons
7
Empedocles believed matter was
made of the atomic model
made of atoms
made of elements and substances
made of earth, air, fire and water
8
Quantum theory explains that ...
Particles remain motionless in the outer most shells
Electrons orbit the nucleus
Particles sometimes exhibit wave properties
It is impossible to determine the exact location of an electron
9
Thompson discovered
protons
electrons
atomic number
neutrons
10
Who discovered at least 23 different elements?
Dalton
Bohr
Rutherford
Lavosier
11
The periodic table is arranged by
Alphabetically
Increasing electrons
Decreasing atomic number
Increasing atomic number
12
Bohr discovered that electrons exist in orbits or shells with the following number of electrons...
2 / 8 / 8
2 / 6 / 8
2 / 8 / 12
2 / 2 / 8
13
Boron has how many neutrons?
7
5
4
6
14
Which is NOT part of Dalton's atomic theory?
Atoms can be created through chemical reactions
Atoms of the same element have the same mass
The joining of atoms of two, or more elements forms compounds.
All elements are composed of atoms
15
Groups or families have...
Similar atomic mass
Similar chemical and physical properties
Similar numbers of protons
Similar trends

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