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- Multiple ChoicePlease save your changes before editing any questions.
What subatomic particles make up the nucleus of an atom?
Electron and Proton
Electron and Neutron
Proton and Neutron
Proton only
- Multiple ChoicePlease save your changes before editing any questions.
The atomic theory states that matter is made up of what?
Atom
Corpucles
Earth and air
Elements
- Multiple ChoicePlease save your changes before editing any questions.
If an atom has more electrons than protons then it has a what?
Neutral charge
Negative charge
No charge
Positive charge
- Multiple ChoicePlease save your changes before editing any questions.
What do you call an atom which has the same number of protons and electrons?
Ion
Isotope
Molecule
Neutral atom
- Multiple ChoicePlease save your changes before editing any questions.
Democritus coined the term "atomos" which means?
Divisible
Invincible
Invisible
Uncuttable
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following is TRUE about an atom?
All matter is made up of it.
It is the smallest particle of an element.
It is made up of protons, electrons, and neutrons.
All of the above.
- Multiple ChoicePlease save your changes before editing any questions.
Who discovered electron?
John Dalton
Ernest Rutherford
James Chadwick
J.J. Thompson
- Multiple ChoicePlease save your changes before editing any questions.
Who discovered neutron?
John Dalton
Ernest Rutherford
James Chadwick
J.J. Thompson
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following models of an atom shows electrons orbiting the nucleus?
Nuclear Model
Planetary Model
Plum Pudding Model
Quantum Mechanical Model
- Multiple ChoicePlease save your changes before editing any questions.
The discovery of isotopes contradicted what postulate of Dalton's theory?
All atoms of a given element are alike.
All matter are made up of atoms.
Atoms may break apart into separate atoms, but the atoms themselves are unchanged.
When atoms form molecules, they unite in small whole numbered ratios.