answer: it is possible to remove neg. charged particles plum pudding model
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What did J.J. Thomson discover about the atom? What atomic model did he propose based on his evidence?. Answer: it is possible to remove neg. charged particles Plum Pudding model. What did Niels Bohr discover about the atom? What atomic model did he propose based on his evidence?. - PowerPoint PPT PresentationTRANSCRIPT
What did J.J. Thomson discover about the atom? What atomic
model did he propose based on his evidence?
Answer: it is possible to remove neg. charged particles
Plum Pudding model
What did Niels Bohr discover about the atom? What atomic model did he propose based on his evidence?
Answer: It’s easy to pluck electrons from an atom the further away they
are. Solar system model
What did Ernest Rutherford discover about the atom? What atomic
model did he propose based on his evidence?
Answer: Tiny particles shot at atom bounced back, most went through.
Nuclear model
For electrons, protons and neutrons – write down the charge on each
particle, the mass of each particle, and where they are found in the
atom.Electron = neg. charge found outside
nucleus, almost zero massProtons = pos. charge, in nucleus, 1 amuNeutron = no charge, in nucleus, 1 amu
Why is the total charge on every atom always zero?
Answer: Protons and electrons cancel each other out
An atom of zinc, Zn, has 40 neutrons. What is the mass of the
atom?
Answer: 30 p + 40 n = 70
An atom of xenon, Xe, has 80 neutrons. What is the mass of the
atom?Answer: 80 neutrons + 54 protons =
134
An atom of zirconium, Zr, has 50 neutrons. What is the mass of the
atom?
Answer: 50 neutrons + 40 protons = 90
An atom of zinc, Zn, has a mass of 65 amu. How many neutrons does
the atom have?Answer: 65 – 30 protons = 35
neutrons
An atom of xenon, Xe, has a mass of 131 amu. How many neutrons does
the atom have?Answer: 131 – 54 protons = 77
neutrons
An atom of zirconium, Zr, has a mass of 91 amu. How many neutrons
does it have?Answer: 91 – 40 protons = 51
neutrons
Isotopes have the same number of __________ but a different number
of ___________.Answer: Protons, neutrons (which means they have a different mass)
An atom of phosphorus, P, has 16 neutrons. What is the mass of the
atom?Answer: 16 neutrons + 15 protons =
31 mass
An atom of platinum, Pt, has a mass of 195 amu. How many neutrons
does the atom have?Answer: 195 – 78 protons = 117
neutrons
An atom of tungsten, W, has 112 neutrons. What is the mass of the
atom?Answer: 112 neutrons + 74 protons =
186
An atom of barium, Ba, has a mass of 133 amu. How many neutrons
does the atom have?Answer: 133 – 56 protons = 77
neutrons
Write out the isotope symbol for two possible isotopes of palladium,
Pd. Which is most abundant?106 10746Pd 46 Pd
Pd – 106 is most abundant (closest to 106.4)
Write out the isotope symbol for two possible isotopes of niobium,
Nb. Which is most abundant?
92 9341 Nb 41 Nb
Nb – 93 is most abundant (closest to 92.91)
Write out the isotope symbol for two possible isotopes of hafnium,
Hf. Which is most abundant?178 17972 Hf 72 Hf
Hf – 178 is most abundant (closest to 178.49)
An atom of niobium, Nb, has 53 neutrons. What is the mass and the
number of protons of this atom? Write out the isotope symbol.
9441 Nb
An atom of molybdenum, Mo, has a mass of 98 amu. How many protons and neutrons does this atom have?
Write out the isotope symbol.14042 Mo
An atom of vanadium, V, has 27 neutrons. What is the mass and the
number of protons of this atom? Write out the isotope symbol.
5023 V
An atom of chromium, Cr, has a mass of 54 amu. How many protons and neutrons does this atom have?
Write out the isotope symbol.
5424 Cr30 neutrons
An atom of ruthenium, Ru, has 59 neutrons. What is the mass and the
number of protons of this atom? Write out the isotope symbol.10344 Ru
An atom of gernamium, Ge has a mass of 76 amu. How many protons and neutrons does this atom have?
Write out the isotope symbol.7632 Ge44 neutrons
Write out the reaction for fluorine-19 undergoing alpha decay
Write out the reaction for carbon-14 undergoing beta decay
Write out the reaction for the fusion of helium-4 with oxygen-16