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In all atoms of bismuth, the number of electrons must equal the*
The diagram below represents a particle traveling through an electric field.
Which particle remains undeflected when passing through this electric field?*
Atoms are neutral because the number of*
What is the net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons?*
The table below shows the number of protons, neutrons, and electrons in four ions.
Which ion has a charge of 2−?*
Which statement explains why a xenon atom is electrically neutral?*
An ion that consists of 7 protons, 9 neutrons, and 10 electrons has a net charge of*
What is the number of electrons in an atom that has 20 protons and 17 neutrons?*
What is the number of electrons in an atom of scandium?*
Which statement describes the charge of an electron and the charge of a proton?*
What is the number of electrons in a potassium atom?*
Which subatomic particles are paired with their charges?*
Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign?*
Base your answers to questions 14 on the information below and on your knowledge of chemistry.
The atomic mass and natural abundance of the naturally occuring isotopes of hydrogen are shown in the table below.
The isotope H-2, also called deuterium, is usually represented by the symbol “D.” Heavy water forms when deuterium reacts with oxygen, producing molecules of D2O.
Explain, in terms of subatomic particles, why atoms of H-1, H-2, and H-3 are each electrically neutral.*
Base your answers to questions 15 on the information below and on your knowledge of chemistry.
One fission reaction for U-235 is represented by the balanced nuclear equation below.
Both radioisotopes produced by this fission reaction undergo beta decay. The half-life of Xe-140 is 13.6 seconds and the half-life of Sr-94 is 1.25 minutes.
On the diagram below, draw an arrow to represent the path of an emitted beta particle in the electric field between two oppositely charged metal plates.