6330962
Pregunta 1
Pregunta
Choose which rule the following suggests: Gold and Iron both are metals but differ in properties such as color and luster.
Respuesta
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All matter are made up of atoms
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Elements may have the same atomic mass but has properties that differ because of isotopes.
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Atoms from different elements different from each other
Pregunta 2
Pregunta
Atoms CAN be destroyed in chemical reactions.
Respuesta
- True
- False
Pregunta 3
Pregunta
Cells: [blank_start]Atoms[blank_end] ; Tissue: Matter
Respuesta
-
Atoms
Pregunta 4
Pregunta
Each element has a unique average mass; however, what is shown on the Periodic Table is the atomic mass not the average
Respuesta
- True
- False
Pregunta 5
Pregunta
Cathode Rays have identical properties regardless of the element used
Respuesta
- True
- False
Pregunta 6
Pregunta
(Rutherford's Gold Foil Experiment)The partcles shot by the emitter were alpha or positive particles
Respuesta
- True
- False
Pregunta 7
Pregunta
Conclusions of Rutherford's Gold Foil Experiment
Respuesta
-
Atoms were mostly empty space
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The nucleus was a positively charged, dense, and small part of the atom
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The nucleus was binded by the nuclear binding force
Pregunta 8
Pregunta
[blank_start]Protons[blank_end], which have a positive charge, and Neutrons, which have a [blank_start]neutral[blank_end] charge, contribute majorly to the mass of the atom while electrons does [blank_start]virtually [blank_end]nothing to the mass.
Respuesta
-
Protons
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neutral
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virtually
Pregunta 9
Pregunta
The nucleus with the nuclear binding force, holds the nucleus together
Respuesta
- True
- False
Pregunta 10
Pregunta
Number of [blank_start]protons[blank_end] + Number of [blank_start]neutrons[blank_end] = Mass Number
Respuesta
-
protons
-
neutrons
Pregunta 11
Pregunta
Number of [blank_start]protons[blank_end] equal to the atomic number which is [blank_start]unique[blank_end] to each element
Respuesta
-
protons
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unique
Pregunta 12
Pregunta
A = ? Z = ? X = ?
Respuesta
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A= mass number Z = Atomic Number X = element symbol
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A= Atomic number Z = Mass Number X = element symbol
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A= mass number Z = Atomic Mass X = element symbol
Pregunta 13
Pregunta
Mass number = Atomic Weight found in the Periodic Table of Eements
Respuesta
- True
- False
Pregunta 14
Pregunta
Isotopes ; Ions
Respuesta
-
Atoms of same element with different amount of neutrons ; atoms that have positive or negative charge
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Atoms of same element with different amount of electrons ; atoms that have neutral charge
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Atoms with different amount of neutrons ; atoms that have positive or negative charge
Pregunta 15
Pregunta
An atom with the number of electrons not equal to the number of protons is an ion
Respuesta
- True
- False
Pregunta 16
Pregunta
To calculate for the [blank_start]average atomic mass[blank_end], you need to multiply each of the atomic masses of each [blank_start]isotope[blank_end] with its respective [blank_start]fractional[blank_end] abundance which you will need to [blank_start]add[blank_end]. The sum is the average atomic mass of the element.
Respuesta
-
average atomic mass
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isotope
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fractional
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add
Pregunta 17
Pregunta
To calculate for the fractional abundance, you will need to multiply the %abundance by 100
Respuesta
- True
- False
Pregunta 18
Pregunta
Formula for Neutron
Respuesta
-
Atomic number-Mass Number
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Mass number-number of protons
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N=Z-A
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