History of Chemistry
Parts of an Atom
Atomic Masses
Chemical or Physical?
Atomic Numbers
100
Scientist who created the atomic model drawn by electron shells.
Who is Bohr?
100
The inner part of an atom that contains the proton and the neutron is called the __________.
What is a 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?
What is a marble?
100
Burning paper
What is a chemical reaction?
100
Atomic numbers of an atom are the same as the number of what in an atom?
protons
200
Did an experiment by bombarding gold foil with alpha particles and identified a nucleus.
Who is Rutherford?
200
These particles have a positive charge and are found inside the nucleus.
What is a proton?
200
Atomic masses are measured in what?
What are AMUs?
200
Breaking a pencil.
What is a physical change?
200
Carbon's atomic number is _______.
6
300
The earliest form of chemistry was called _______.
alchemy
300
These particles are located within the nucleus, and have no charge.
What is a neutron?
300
A proton has the atomic mass of what?
What is 1?
300
A glow stick glowing in the dark?
What is a chemical reaction?
300
What element has a number of 56?
barium
400
Names for elements comes from the English or __________ name.
What is latin?
400
These particles are negatively charge and are found outside the nucleus.
What are electrons?
400
A neutron has the atomic mass of what?
What is 1?
400
The five pieces of evidence that a chemical reaction took place.
What are gives off heat, gives off light, changes color on its own, bubbles, forms a precipitate?
400
Why does hydrogen have an atomic number of 1?
because it only has one proton
500
Created an atomic model with element symbols and their valence electrons.
Who is Lewis?
500
Most of the mass of an atom is located here.
What is a nucleus?
500
The reason electrons are not included in the mass?
What is outside the nucleus?
500
Cracking an egg
What is a physical change?
500
Some atoms have more ___________, which makes it an isotope and gives it a negative charge
electrons
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