12762308
Frage 1
Frage
Define isotope
Antworten
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A positively or negatively charged atom
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Different forms of the same element with a different number of protons
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Different forms of the same element with a different number of neutrons
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A positively and negatively charged group of atoms
Frage 2
Frage
Isotopes have different physical properties
Antworten
- True
- False
Frage 3
Frage
What did J. J. Thomson discover?
Antworten
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Protons
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Electrons
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Neutrons
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Ions
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Atoms weren't solid
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Atoms are solid spheres
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Shells
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Plum pudding model
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Tiny positively charged nucleus surrounded by a 'cloud' of negative electrons
Frage 4
Frage
What did Rutherford discover?
Antworten
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Protons
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Electrons
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Neutrons
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Ions
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Atoms aren't solid
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Atoms are solid spheres
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Shells
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Plum pudding model
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Tiny positively charged nucleus surrounded by a 'cloud' of negative electrons
Frage 5
Frage
The relative atomic mass is the [blank_start]weighted[blank_end] mean mass of an atom of an element, compared to 1/12 of the mass of an atom of [blank_start]carbon-12[blank_end].
Antworten
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carbon-12
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weighted
Frage 6
Frage
Define relative molecular mass
Antworten
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The average mass of a molecule compared to 1/12 of the mass of an atom of carbon-12
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The weighted mean mass of an atom of an element, compared to 1/12 of the mass of an atom of carbon-12
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The average mass of a formula unit, compared to 1/12 of the mass of an atom of carbon-12
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The mass of an atom of an isotope of an element compared to 1/12 of the mass of an atom of carbon-12
Frage 7
Frage
What is the difference between relative formula mass and relative molecular mass?
Antworten
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Relative molecular mass is compared to 1/12 of the mass of an atom of carbon-12, whist formula is compared to the whole atom
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Relative formula mass is used for charged molecules
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Relative formula mass is used for compounds that are ionic or giant covalent
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Relative formula mass is used for metallic compounds
Frage 8
Frage
How many particles are in one mole?
Antworten
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6.02 x 10²⁴
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6.02 x 10²³
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6.02 x 10²⁶
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6.02 x 10²¹
Frage 9
Frage
What is the ideal gas equation?
Antworten
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pR = nVT
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p = nRT
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pT = nRV
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pV = nRT
Frage 10
Frage
What is the equation that links concentration with moles and volume?
Antworten
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Moles = Concentration x Volume
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Moles = Concentration / Volume
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Moles = Volume/ Concentration
Frage 11
Frage
The empirical formula is the [blank_start]smallest[blank_end] whole number [blank_start]ratio[blank_end] of atoms of each element in a compound.
Antworten
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smallest
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ratio
Frage 12
Frage
The molecular formula is the actual numbers of [blank_start]atoms[blank_end] of each type of [blank_start]element[blank_end] in a molecule.
Antworten
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atoms
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element
Frage 13
Frage
When a hydrocarbon is burnt in excess oxygen, 8.8g of CO₂ and 3.6g of H₂O are made. What is the empirical formula of the hydrocarbon?
Antworten
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CH₄
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C₂H₄
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CH
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CH₂
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