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WorksheetsAtomic structure
Total questions: 25
Worksheet time: 1hrs 15mins
Who was the Greek philosopher who called the smallest particle of matter an "atom"?
Democritus
Aristotle
J.J Thompson
Einstein
All matter is made of
energy
atoms
electrons
compounds
The smallest particle of an element that still represents that element.
Nucleus
electron
proton
atom
Which scientist discovered the electrons?
Dalton
Thomson
Atristotle
Bohr
Bohr discovered that electrons are located in
the nucleus
inside protons
electron cloud
circular orbits around the nucleus
What is a particle with one negative charge called?
electron
proton
quark
neutron
What is a particle with one positive charge called?
proton
electron
neutron
quark
What is the neutral particle found in the nucleus called?
proton
neutron
electron
quark
What is the center of an atom called?
nucleus
electron cloud
proton center
photon center
Which of the following is/are conclusions based on Rutherford’s gold foil experiment?
Atom is mostly empty space
The nucleus is positively charged
The atom has a small dense nucleus
All answers are correct
The majority of an atom's mass exists ...
In the nucleus
In the electron cloud
In the space between the nucleus and the electrons
In the neutrons
The diagram represents the neutral lithium atom. All particles in the atoms are shown on the diagram. How many electrons does in this diagram?
(a)
The diagram represents the neutral lithium atom. All particles in the atoms are shown on the diagram. How many neutrons does in this diagram?
(a)
Who's developed the idea that an atom consist of electrons that surrounded by protons like plum surrounded by pudding?
(a)
A isotope of Iridium -192 is written using this symbol. How many protons does a nucleus of Iridium-192 contains?
(a)
A isotope of Iridium -192 is written using this symbol. How many neutrons does a nucleus of Iridium-192 contains?
(a)
