Term
Who believed the world is ultimately made up of two things:
1. Empty Space
2. Indivisible Particles |
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Definition
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| The modern atomic theory differs from Dalton's atomic theory due to the discovery of two things: |
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Definition
1. Discovery of Subatomic Particles
2. Discovery of Isotopes |
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Term
| The total number of protons and neutrons in the nucleus |
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Definition
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Term
| 1/12 the mass of a carbon-12 atom |
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Definition
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Term
| That atomic number tells you the number of ____________ in the nucleus of an atom |
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Definition
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Term
| The weighted avearge of the masses of the isotopes of an element |
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Definition
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Term
| Atoms with the same # of protons, but different numbers of neutrons are known as... |
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Definition
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Term
| What is a negatively charged subatomic particle? |
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Definition
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Term
| What is the name for a subatomic particle with no charge? |
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Definition
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Term
| The positively charged, central part of the atom, that contains most of an atoms mass is known as... |
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Definition
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Term
| What subatomic particle is positively charged? |
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Definition
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Term
| How would you determine the number of neutrons in the nucleus of an atom? |
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Definition
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Term
Who invented the
Law of Conservation of Mass? |
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Definition
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Term
Whose atomic theory is stated below...
1. All matter is made up of atoms
2. Atoms are indivisible particles that cannot be divided into smaller particles
3. Atoms of the same element are identical, but they are different from atoms of other elements
4. Atoms of one element can never be changed into atoms of anther element as a result of a chemical reactions. |
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Definition
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Term
How many protons, neutrons, and electrons does an atom with an a
atomic # 50 and mass # 120 contain? |
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Definition
- 50 Protons
-50 Electrons
-70 Neutrons |
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Term
What units do chemists used to measure the atomic mass?
(formerly amu) |
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Definition
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Term
What is the atomic mass
of Carbon-12? |
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Definition
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Term
| Who used the gold foil experiment to discover that atoms have a positively charged nucleus? |
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Definition
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Term
| What is the symbol, charge, and mass for Electrons? |
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Definition
Symbol: e-
Charge: 1-
Mass: 1/1840 |
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Term
| What is the symbol, charge and mass for a Proton? |
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Definition
Symbol: P+
Charge: 1+
Mass: 1 |
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Term
| What is the symbol, charge and mass for a Neutron? |
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Definition
Symbol: N
Charge: 0
Mass: 1 |
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Term
| What is the problem with the ideas of Democritus and other philosophers from a scientific view? |
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Definition
* They did not test their hypothesis using experiments.
*They made educated guesses, but did not have data to support their theories. |
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