Term
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Definition
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Term
| What does the word atom mean? |
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Definition
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| Who was the first to discover the atom could be divided? |
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Definition
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Term
| What are the orbitals found in the fourth energy level? |
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Definition
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Term
| What are positively charged subatomic particles found in the nucleus of all atoms? |
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Definition
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Term
| How do you get the number of protons in the nucleus of an atom? |
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Definition
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Term
| If element J has 17 Protons and 32 neutrons it is said to be an _________? |
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Definition
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Term
| the number of neutrons of an atom can be found by subtracting the __________ from the ____________. |
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Definition
| Atomic number from mass number. |
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Term
| The location of an electron depends on how much _____ the electron has. |
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Definition
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Term
| What gives the element its chemical properties? |
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Definition
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Term
| The ________ is responsible for radioactive decay in the atom. |
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Definition
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Term
| The force of attraction exerted between all objects in nature. |
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Definition
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Term
| The nucleus of an atom contains_____ and ______. |
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Definition
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Term
| Most of the mass in an atom is located in the _________? |
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Definition
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Term
| The "plum pudding theory" was developed by? |
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Definition
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Term
| The modern atomic model is based on? |
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Definition
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Term
| What are particles smaller than an atom? |
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Definition
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Term
| What are atoms of the same element that have the same number of protons but a different number of neutrons? |
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Definition
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Term
| What is the sum of the number of protons and number of neutrons found in an atoms nucleus? |
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Definition
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Term
| The ______ energy level is found closet to the nucleus. |
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Definition
| Lowest. (least amount of energy) |
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Term
| The _________ holds protons together in the nucleus of an atom. |
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Definition
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Term
| What is the greatest force in the atom? It has a limited _______? |
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Definition
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Term
| who discovered that an atom has mostly empty space and has a positive _______? |
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Definition
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Term
| Whats the modern atomic theory? |
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Definition
a.)based on wave mechanics.
b.)small positively charged nucleus.
c.)enough electrons to make nucleus neutral. |
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Term
| What are found in the nucleus that have no charge? |
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Definition
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Term
| Dalton's atomic theory stated that atoms of the same ___________ are exactly alike. |
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Definition
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Term
| The ______ holds the electrons in orbit around the nucleus. |
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Definition
| Electric magnetic force of attraction. |
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Term
| What is the small heavy center of an atom? |
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Definition
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Term
| Who discovered that electrons orbit the nucleus? |
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Definition
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Term
| According to the modern atomic theory, the exact location of ________ is uncertain, but the region in which there is a high probability of finding an electron is in the _________. |
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Definition
| electrons, orbitals of the electron cloud. |
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Term
| __________ have slightly more mass than a ________, but both have a mass of _______. |
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Definition
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Term
| What identifies an element and will never change? |
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Definition
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Term
| _________ is the average mass of all the isotopes of that element as they occur in nature. |
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Definition
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Term
| What and where are the negatively charged particles in an atom? |
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Definition
| Electrons, electron cloud. |
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Term
| An electron moves farther from the nucleus as it _________. |
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Definition
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Term
| A group of 3 __________ make up a proton or a neutron. |
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Definition
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Term
| The ______________ acts as a force of attraction or repulsion. |
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Definition
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Term
| The 2 main forces that hold an atom together are __________ and ___________. |
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Definition
| Strong force, electromagnetic force of attraction. |
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