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structure of atom
structure of atom
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A #chemistry review models and structure of atom
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Answers
1
One of the differences between a proton and an electron is that an electron has a greater
mass
density
electrical charge
range of motion
2
Who came up with the "raisin pudding" model?
Millikan
Bohr
Rutherford
Thomson
3
Who originally proposed the concept that matter was composed of tiny indivisible particles?
Democritus
Millikan
Schrodinger
Aristotle
4
Which element has the atomic number of 79?
gold
copper
mercury
silver
5
The mass number minus the atomic number will give you the number of
neutrons
protons
isotopes
electrons
6
Where is most of the mass in an atom located?
neutron
electrons
nucleus
protons
7
If you know the atomic number you know
number of protons
number of neutrons
both number of electrons and protons
number of electrons
8
Which element has 17 protons?
nitrogen
hydrogen
chlorine
bromine
9
Who discovered the neutron?
Bohr
Thomson
Democritus
Chadwick
10
All models of the atom before 1900 based on belief of
atomic number
electron cloud model
isotopes
indivisible atom
11
Who came up with the word "atom"?
Democritus
Dalton
Rutherford
Thomson
12
How many protons are in hydrogen’s less common isotopes, Hydrogen-2 and hydrogen-3?
there is only one proton in each
1 and 2, respectively
2 and 3, respectively
3 and 4, respectively
13
In carbon-14, how many neutrons are there if atomic number of carbon is 6?
20
6
14
8
14
Who is the Father of the Periodic Chart, based elements on atomic mass.
Mendeleev
Bohr
Mendel
Moseley
15
Oxygen-17, with an atomic number of 8, has _?_ neutrons.
8
6
13
9
16
Who came up with the Atomic Theory?
Dalton
Democritus
Rutherford
Thomson
17
Which atomic particles are located in the nucleus?
neutrons and electrons
neutrons and protons
protons
protons and electrons
18
Who came up with periodic chart based on atomic number?
Moseley
Mendeleev
Bohr
Schrodinger
19
What is the charge of an electron?
positive
I do not know
negative
neutral
20
Atoms with the same number of protons but different number of neutrons are called
isotopes
elements
ions
neutral
21
The mass number of an atom depends in part on the number of
neutrons
electron clouds
energy levels
electrons
22
Who said that electrons move in paths?
Bohr
Moseley
Schrodinger
Mendeleev
23
The same number of protons and electrons so atom is balanced is called
electron cloud
isotope
neutral atom
atomic mass number
24
Rutherford used alpha particles to discover the
electrons
nucleus
protons
neutrons
25
What is the charge of a neutron?
negative
positive
Dunno
no charge
26
Who came up with the electron cloud model?
Schrodinger
Bohr
Moseley
Millikan
27
Who discovered charge of the electron?
Moseley
Schrodinger
Bohr
Millikan
28
How many electrons can the second level hold in a Bohr's model?
2
6
8
18
29
What is the positive charged particle of an atom?
neutrons
protons
electronss
nucleus
30
The average mass of all the isotopes determines
mass number
atomic mass unit
atomic number
neutral atom
31
Which part of the atom has no charge?
neutron
isotope
proton
electron
