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History of Chemistry
Parts of an Atom
Atomic Masses
Physical or Chemical?
Atomic Numbers
100
What was the object of the dream that Kekule' had that created double bonds?
A snake biting its own tail.
100
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
100
If an atom was enlarged so the electrons were spinning around the stands of a football stadium, how big would the nucleus be?
marble
100
A reaction in which light is given off.
chemical
100
Atomic numbers of an atom are the same as the number of what in an atom?
protons
200
What is the Lewis Dot Model?
The element symbol surrounded by the same number of dots as valence electrons.
200
These particles have a positive charge and are found inside the nucleus.
proton
200
Atomic masses are measured in what?
AMU
200
Odor
physical
200
Carbon's atomic number is _______.
6
300
What is in the center of a Bohr model?
Protons and Neutrons
300
These particles are located within the nucleus, and have no charge.
Neutron
300
A proton has the atomic mass of what?
1
300
A reaction resulting in color changing on its own
chemical
300
What element has a number of 56?
barium
400
Names for elements comes from the English or __________ name.
Latin
400
These particles are negatively charge and are found outside the nucleus.
electrons
400
A neutron has the atomic mass of what?
1
400
A reaction resulting in bubbling.
chemical
400
Why does hydrogen have an atomic number of 1?
because it only has one proton
500
Who invented the Periodic Table?
Mendeleev
500
Most of the mass of an atom is located here.
nucleus
500
Why aren't electrons factored in to the mass of an atom?
They are moving around in the electron shells. They are not in the nucleus.
500
A situation resulting in a phase change.
physical
500
Some atoms have more ___________, which makes it an isotope and gives it a negative charge
electrons