9329804
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Who came up with an idea in 460-370 BC that atoms existed , couldn't split or destroy them?
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Dalton
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Democritus
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Thomson
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Rutherford
Frage 2
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Who came up with an idea in 1800's that atoms are hard spheres with differing properties?
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Dalton
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Thomson
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Rutherford
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Democritus
Frage 3
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Who discovered electrons in 1897 and came up with the Plum Pudding model?
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Rutherford
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Thomson
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Democritus
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Dalton
Frage 4
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Who had a gold foil experiment in 1911 that made the plum pudding model wrong , and came up with an idea that most of an atom is an empty space?
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Rutherford
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Democritus
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Dalton
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Thomson
Frage 5
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What did Bohr-Rutherford came up with in 1912?
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He came up with an idea that electrons are in energy shells and they orbit around the nucleus
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He came up with an idea that nucleus are full of dejunctional energy
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He came up with an idea that atoms are small hard spheres
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He came up with an idea that people just dream so big but end up in a street.
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He came up with an idea that the atom particles consists of further smaller parts.
Frage 6
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Electrons always [blank_start]equal[blank_end] the number of protons
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equal
Frage 7
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Protons have a charge of [blank_start]+ve[blank_end] and a mass of [blank_start]1[blank_end]
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+ve
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1
Frage 8
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Electrons have a charge of [blank_start]-ve[blank_end] and a mass of [blank_start]1/1836[blank_end]
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-ve
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1/1836
Frage 9
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Neutrons have a charge of [blank_start]0[blank_end] and a mass of [blank_start]1[blank_end]
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0
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1
Frage 10
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Atomic mass and mass number the same thing?
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- True
- False
Frage 11
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Mass number // Atomic mass : It is the number of [blank_start]protons[blank_end] and [blank_start]electrons[blank_end] in an atom . *Put it in plural form and make the answer with a letter P starting on it first.*
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protons
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electrons
Frage 12
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Atomic number
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Mass number
Frage 13
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11
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23
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11
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11
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12
Frage 14
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Isotopes are the different atoms of the same element containing the [blank_start]same[blank_end] number of [blank_start]protons[blank_end] but different amount of [blank_start]neutrons[blank_end].
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same
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protons
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neutrons
Frage 15
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Isotopes , fill in how many protons and neutrons in each isotope . Ignore the electrons .
Image:
Mobile upload (image/jpeg)
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6
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6
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6
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6
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7
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8
Frage 16
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[blank_start]Omitri[blank_end] [blank_start]Mandelev[blank_end] created the periodic table in [blank_start]1869[blank_end] , he arranged it in order of [blank_start]increasing[blank_end] atomic mass.
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Omitri
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Mandelev
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1869
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increasing
Frage 17
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Electron configuration. The first energy shell can hold a maximum of [blank_start]2[blank_end] electrons , the second and so on can hold a maximum of [blank_start]8[blank_end] electrons.
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2
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8
Frage 18
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The electric configuration for sodium is 2.[blank_start]8[blank_end].[blank_start]1[blank_end].
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8
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1
Frage 19
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An Ion is an [blank_start]electrically[blank_end] charged particle
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electrically
Frage 20
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Ionic bonding=[blank_start]Transfer[blank_end] of [blank_start]electrons[blank_end].
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Transfer
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electrons
Frage 21
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One way of atoms of different elements forming chemical bonds to make a new compound is by IONIC BONDING
Antworten
- True
- False
Frage 22
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The element that loses its electron will become [blank_start]positive[blank_end] and the element that gains the electron will become [blank_start]negative.[blank_end]
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positive
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negative.
Frage 23
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cation
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anion
Frage 24
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- True
- False
Frage 25
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- True
- False
Frage 26
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calcium sulfide
Frage 27
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In potassium sulfate , there's potassium , sulphur , and [blank_start]oxygen[blank_end] .
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oxygen
Frage 28
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Depending on the group number , you can find out the valency number.
Antworten
- True
- False
Frage 29
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From group number 1-8 , list the valencies from the 1st group number to the last.
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1 , 2 , 3 , 4 ,3 , 2 , 1 ,0
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2 , 6 , 8 ,10 , 12 ,14 ,16 , 18
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3 , 2 , 4 ,1 , 5 , 6 ,7 ,8
Frage 30
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The diatomic elements are B[blank_start]romine[blank_end] , I[blank_start]odine[blank_end] , n[blank_start]itrogen[blank_end] , chlorine , oxygen , and fluorine .
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romine
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odine
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itrogen
Frage 31
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Transition metals valency is always [blank_start]2[blank_end] unless told otherwise by Roman numerals.
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2
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