LD Chemistry - Bohr Model & Electron Dot - Quiz #2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What are protons, electron and neutrons? | subatomic particles
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| Proton ( charge, location, relative mass in amu?) | positively charged, relative mass of 1 amu, in nucleus
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| Electron ( charge, location, relative mass in amu? | negatively charged, relative mass of 1/2000 or 2000 less massive then proton or neutron, located outside the nucleus.
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| Neutron ( charge,location, relative mass in amu?) | neutral subatomic particle, found in nucleus, mass exactlly as proton- approximately 1 amu
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| What is the atomic number? | number of protons in an atom of specific element
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| Atoms of different elements have ______________ of protons | different number
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| What is mass number? | sum of protons and neutrons in the nucleus of an atom
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| How do you calculate number of neutrons? | mass number - atomic number
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| What are isotopes? | atoms of the same element that have different number of neutrons and different mass number
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| What is the same for the isotopes of the same element? | atomic number ( number of protons)
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| What is this C- 14? | isotopic notation for the isotope of carbon that has mass number of 14
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| Explain how different mass numbers of isotopes contribute to the average atomic weight for a given element. | The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth.
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| In a neutral atom: | amount of protons and electrons is equal
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| In an isotope: | number of protons is the same, but the number of neutrons is different for different isotopes of the same element.
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| In an ion: | number of electrons and protons is no longer equal.
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| Ion | atom that has a net negative or positive charge .
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| How is charge represented? | by plus or minus sign after the number
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| Anion | ion with a negative charge
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| Cation | ion with a positive charge
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| Explain Cl 1- | it is a chlorine atom that has one extra electron, it is negativelly charged, called anion
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| Explain Na 1+ | It is a sodium ion that has one extra proton ( it lost one electron), it has positive charge, it is called cation
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| Which distinguished an atom of one element from atom of a different element? | number of protons
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| Describe an atom: | a core of protons and neutrons surrounded by electrons
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| What is found the farthest from the center of the atom? | electron
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| Compare subatomic partciles | electron-negative-smallest mass,around nucleus
neutron-neutral- mass as proton-in the nucleus
proton-positive-in nucleus-mass as neutron
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| If neutral atom of silver (Ag) has 47 protons, how many electron will orbit its core: | 47
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| Subatomic particles found inside the nucleus of an atom | proton and neutron
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| Describe the relationship of subatomic particle in a neutral atom | the number of protons equal the number of protons
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| Who developed atomic theory of matter? | Dalton
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| The Planetary model? | Rutherford
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| The Solid sphere? | Dalton
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| Who discovered the nucleus? | Rutherford
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| The Cathode ray tube experiment? | Thomson
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| All elements are composed of atoms? | Dalton
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| Plum pudding model? | Thomson
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| Gold foil experiment? | Rutherford
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| Discovered electron? | Thomson
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| Model with electrons orbiting energy levels? | Bohr
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