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Cards In This Set
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Chemical Elements
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All forms of matter are composed of ____ _____ which are substances that cannot be split into simpler substances by ordinary chemical means.
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Elements; Chemical Symbols.
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____ are given letter abbreviations called..___
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Trace Elements
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Are present in tiny amounts.
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Atoms
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Units of matter of all chemical elements are called
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Element
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Is a quantity of matter composed of atoms of the same type.
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117
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How many elements are there?
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Atomic Number
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Is a number of protons in the nucleus.
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Mass Number
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Is the sum of its protons and neutrons.
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Mass
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___ is measured as a dalton.
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1.008 daltons
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Neutron has a mass of?
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1.007 daltons
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Protons have a mass of?
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0.0005 daltons
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Electrons have a mass of?
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Isotope
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Atomic mass is close to the mass number of its most abundant _____
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Atomic Weight
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The atomic mass, also called the ____ ____ , of an element is the average mass of all its naturally occuring isotopes and reflects the relative abundance of isotopes with different mass numbers.
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Ions
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- An atom that gave up or gained an electron
- Written with its chemical symbol and (+) or (-)
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