6330962
Questão 1
Questão
Choose which rule the following suggests: Gold and Iron both are metals but differ in properties such as color and luster.
Responda
-
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
Questão 2
Questão
Atoms CAN be destroyed in chemical reactions.
Responda
- True
- False
Questão 3
Questão
Cells: [blank_start]Atoms[blank_end] ; Tissue: Matter
Responda
-
Atoms
Questão 4
Questão
Each element has a unique average mass; however, what is shown on the Periodic Table is the atomic mass not the average
Responda
- True
- False
Questão 5
Questão
Cathode Rays have identical properties regardless of the element used
Responda
- True
- False
Questão 6
Questão
(Rutherford's Gold Foil Experiment)The partcles shot by the emitter were alpha or positive particles
Responda
- True
- False
Questão 7
Questão
Conclusions of Rutherford's Gold Foil Experiment
Responda
-
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
Questão 8
Questão
[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.
Responda
-
Protons
-
neutral
-
virtually
Questão 9
Questão
The nucleus with the nuclear binding force, holds the nucleus together
Responda
- True
- False
Questão 10
Questão
Number of [blank_start]protons[blank_end] + Number of [blank_start]neutrons[blank_end] = Mass Number
Responda
-
protons
-
neutrons
Questão 11
Questão
Number of [blank_start]protons[blank_end] equal to the atomic number which is [blank_start]unique[blank_end] to each element
Responda
-
protons
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unique
Questão 12
Questão
A = ? Z = ? X = ?
Responda
-
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
Questão 13
Questão
Mass number = Atomic Weight found in the Periodic Table of Eements
Responda
- True
- False
Questão 14
Questão
Isotopes ; Ions
Responda
-
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
Questão 15
Questão
An atom with the number of electrons not equal to the number of protons is an ion
Responda
- True
- False
Questão 16
Questão
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.
Responda
-
average atomic mass
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isotope
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fractional
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add
Questão 17
Questão
To calculate for the fractional abundance, you will need to multiply the %abundance by 100
Responda
- True
- False
Questão 18
Questão
Formula for Neutron
Responda
-
Atomic number-Mass Number
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Mass number-number of protons
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N=Z-A
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