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26 Cards in this Set
- Front
- Back
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Protons and Neutrons are found in a small, positively-charged center of the atom called? |
Nucleus |
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Positively charged particles |
Protons |
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Negatively charged particles |
Electrons |
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Particles with a neutral charge |
Neutrons |
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Protons and neutrons are made up of even smaller particles called? |
Quarks |
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The area around the nucleus of an atom where its electrons are most likely found. |
Electron Cloud |
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Where most of the mass of an atom is located. |
Nucleus |
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The unit of measurement for atomic particles. |
Atomic Mass Unit (amu) |
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The number of protons in an atom is equal to a number called? |
The atomic number |
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The sum of the number of protons and the number of neutrons in the nucleus of an atom. |
Mass Number or also called Atomic Mass |
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Matter that is composed of just one type of atom. |
Element |
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The smallest piece of matter that still retains the property of an element. |
Atom |
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The vertical columns of elements located on the periodic table are known as? |
Groups/Families |
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The horizontal rows on the periodic table are called? |
Periods |
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Where do elements get their names? |
Elements are named after scientists, by a committee using established rules, or after the place where the element was discovered. |
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The first letter in the element symbol must always be what? |
Capitalized |
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The second letter in the element symbol must always be what? |
Lower case |
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The current model of the atom that is used today. |
The electron cloud model |
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Which subatomic particles are located inside the nucleus? |
Protons and Neutrons |
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Which subatomic particles are located outside the nucleus? |
Electrons |
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Protons and neutrons are about 2,000 times more massive than a what? |
Electron |
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What does the number of protons tell you in regards to an atom? |
The type of element that you have. |
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The number of protons is equal to what? |
The atomic number |
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Not all atoms of an element have the same number of ?
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Neutrons |
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Atoms of an element that have the same number of protons but a different number of neutrons is called? |
Isotope |
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The weighted average mass of all the isotopes of an element is called? |
Average atomic mass |
