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Chem Test

atomic mass

QuestionAnswer
conducted an experiment- flying a kite with a key Franklin
these have a mass of 1 atomic mass unit (AMU) protons and neutrons
the charge and mass number number of a neutron are charge=0, mass number= 1
the nucleus of most atoms is made up of protons and neutrons
the nucleus of the atom is held together by nuclear forces
what constitutes most of the volume of an atom shells or orbitals
the atomic number of an element is equal to the number of protons in the atom
the mass number of an atom is determined by adding the neutrons and protons
the charge and mass number of an electron are charge= -1,mass number= 0
which of the following descriptions apply to the nucleus charges
most of the mass of the atom can be found in the nucleus
the charge and mass number of a proton are charge= 1, mass number= 1
the laws of electrostatics consistently demonstrate that "like" (identical) charges attract
isotopes are atoms of the same element that differ in the mass number
from rutherfords experiment could be deduced the atom is mostly empty space
a proton none of the above
the mass number is the average mass of the isotopes of that atom
an electron has a mass of almost zero
isotopes are atoms of the same element with a different number of neutrons
alpha particles are the same as a helium-nuclei
in bohrs atomic model the electrons move around the nucleus in a circle or orbits
which is not true? all are false
devised the "gold foil experiment" rutherford
plum pudding model. positively charged goo with negative chunks randomly scattered thompson
created the law of conservation of matter lavosier
thompson found that atoms could sometimes eject a far smaller negative particle which he called an electron
rutherford found that they fired a ____ at a piece of gold foil which was only a few atoms thick helium-nuclei or an alpha particle
with electronic configuration elements are represented numerically by the ___ in their shells and numbers of shells number of electrons
which is not true? atoms of different elements contain different number of electrons
isotopes of any particular element contain the same number of ___, but different numbers of ___ protons and neutrons
who suggested that all matter was made up of tiny spheres that were also to bounce around with perfect elasticity dalton
his new evidence allowed him to propose a more detailed model with a central nucleus rutherford
which is not alpha decay Bismuth-214 to Polonium-214
which one is alpha decay Polonium-214 to lead-210
radium-224 alpha decay Rn 220 and He Nucleus
radon-219 alpha decay Po 215 and He Nucleus
bismuth-210 beta decay Po 210 and electron
bismuth-214 beta decay Po 214 and electron
Dalton was wrong about the atom because of two reasons atoms can be split and isotopes
which is true all are true
Created by: agustina92797