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Atomic Theory
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How many electrons does a neutral Neon (Ne) have?
10
The elements of the periodic table are arranged according to their _______.
Atomic number
British physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932.
James Chadwick
The scientist responsible for discovering electrons.
J.J. Thomson
An atom has atomic number 7, mass number 15, and net charge +2. How many neutrons are in the atom?
8
What is the net charge of an atom with 8 neutrons, 3 electrons, and 7 protons?
+4
What is the net charge of an atom with 3 electrons and 5 protons?
+2
Nickel (Ni) element has how many protons?
28
Which element has 17 protons?
chlorine
An atom with mass number: 25, neutron: 11, and net charge: +1. What is the number of electrons?
13
An atom has atomic number 7, mass number 15, and net charge +2. How many electrons are in the atom?
5
An atom with electron: 10, mass number: 16, and net charge: -3. What is the number of neutrons?
9
An atom with electron: 10, mass number: 16, and net charge: -3. How many protons are in the atom?
7
Which sub-atomic particle is negatively charged?
electron
Which sub-atomic particle is positively charged?
proton
If Aluminum has an atomic number of 13 and it has 14 neutrons, what is the mass number of Aluminum?
27
Which model of the atom is represented in the picture shown below?
Nuclear model or Rutherford's model
Which model of the atom is represented in the picture shown below?
Dalton's Model or Solide Sphere model
Which model of the atom is represented in the picture shown below?
Quantum Model / Schrodinger's Model
Which model of the atom is represented in the picture shown below?
Thomson Model or Plum Pudding Model
Which model of the atom is represented in the picture shown below?
Bohr’s Model or Planetary model
Which scientist is responsible for the discovery of the nucleus?
Ernest Rutherford
A neutral atom occurs when _____.
The number of Protons = the number of Electrons
For an atom to have a net charge of zero both ___ and ____ must be the same.
Protons and Electrons
For an atom to have a +1 charge the Number of _____ must be greater than the number of ___.
Protons / Electrons
To calculate the number of Neutrons in an atom, subtract the __ from the ____.
Atomic Number / Atomic Mass or proton / Atomic Mass
The Atomic Number (Z) of copper.
29
The Atomic Number (Z) of Phosphorus.
15
The cluster of particles in the center are called...
nucleus
A change in the number of _______ changes the identity of the atom.
proton/s
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