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24 Cards in this Set
- Front
- Back
true or false/ Adding or removing protons from the nucleus of an atom creates a different element?
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TRUE
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What is the Mass Number?
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An element's or isotope's mass number tells how many protons and neutrons in its atoms.
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What is the Atomic Number?
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An element's or isotope's atomic number tells how many protons are in its atoms.
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Neutrons are all identical to each other, just as protons are.
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TRUE
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Atoms of a particular element must have the same number of protons but can have different numbers of neutrons.
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TRUE
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When an atom does not have the same number of protons and neutrons, it is called an
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isotope
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An element's or isotope's atomic number tells how many protons are in its atoms.
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TRUE
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An element's or isotope's mass number tells how many protons and neutrons in its atoms.
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TRUE
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Electrons
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Electrons spin and rotate around the outside of the nucleus.
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As the electrons circle the nucleus they travel at certain energy levels but can "jump" between different energy levels if they gain or lose energy.
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TRUE
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ATOM
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An atom is the smallest particle of any element that still retains the characteristics of that element.
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DEFINE AN ELEMENT
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All matter, such as solids, liquids and gases, is composed of atoms. Any material that is composed of only one type of atom is called a chemical element, a basic element, or just an element.
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The atoms of one element are different from those of all other element.
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TRUE
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Compounds are made when atoms of different elements are chemically combined together.
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TRUE
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two electrons spinning and orbiting in opposite direction
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PAIRED ELECTRONS
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The overall magnetic field strength of atoms with all paired electrons equals?
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zero.
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In general, materials that have all paired electrons in the atoms and thus have no net magnetic moment are called ?
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diamagnetic materials
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Most materials with one or more unpaired electrons are at least slightly magnetic. Materials with a small attraction to a magnet are called 1.________ _______, and those with a strong attraction are called 2._________ __________.
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1. paramagnetic materials
2. ferromagnetic materials. |
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1. What are some paramagnetic materials?
2, What are some ferromagnetic materials? |
1. Aluminum, platinum, and manganese
2. Iron, cobalt, and nickel. |
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A magnetic field
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A magnetic field describes a volume of space where there is a change in energy
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The spinning and orbiting of the nucleus of an atom produces a magnetic field . The strength of this field is called the ?
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magnetic moment.
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gyro magnetic rotation in 1 Tesla
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42.58 [MHz/T]
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Larmar Equation
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Processional Frequency = Gyro Magnetic Ratio x Main Magnetic Field (or)
{MHz] = [MHz/T] x [T] (or) Wo = d x Bo (or) Wo = 42.58 x Bo |
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A molecule
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A molecule is a group of atoms bunched together.
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