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WorksheetsThe Discovery of the Atom
Total questions: 15
Worksheet time: 8mins
What was the first discovered part of the atom?
Electron
Proton
Neutron
quark
Democtrius' theory believed that all matter was made of tiny distinct elements.
True
False
What is the mass number of an element?
the amount of protons
the amount of electrons, protons, and neturons
the amount of protons and neutrons
the average mass of an element's isotopes.
What is the atomic mass?
the average of the mass of the element's isotopes
the average mass of electrons
the average mass of the netrons and electrons
the average mass of all atoms divided by 1800.
What makes an ion postive?
The loss of an electron.
The loss of a neutron.
The loss of a proton.
The loss of an electron's outer shell.
A negative ion loses an electron.
True
False
The Bohr's model of the atom shows...
electrons moving in random, straight lines
electrons moving in circular motions around a nucleus.
electrons moving throughout the entire atom
What is an ion?
An atom that gains or loses electrons
Pieces of the atom that are atoms of the same element
An atom that is the sum of the number of protons and neutrons in an element.
Aristotle believed that all matter is made of....
Fire
Air
Water
Earth
All of these.
The isotope is the change in what number of the nucleus?
Protons
Neutrons
Electrons
Protons and Neutrons
The names of quarks are: left, right, change and charm
up and down
gumball and darwin
Rutherford and his students discovered which part of the atom?
The nucleus
The protons
the nucleus and proton
the outer edge of the electrons
The discovery of alpha decay is always the same. What happens in alpha decay?
Protons are lost and the atom becomes an ion.
Neutrons are lost and the atom does not change.
Two neutrons and Protons are lost and the atom changes by two.
The decay does nothing to the atom.
Beta decay is a constant type of decay and always has the same effect on an atom.
A proton is lost and a neutron is gained and gamma rays are emitted.
A neutron changes to a proton and the atom becomes a new element.
An electron explodes and changes the whole periodic table.
The hulk smashes atoms and oh what a mess.
Gamma ray decay has no particles and because of that
does not change into any new element.
makes little hulks of tons of matter.
changes all atoms at all times.
makes the periodic table of elements upredictable.
