Which scientist found evidence for the existence of neutrons?
James Chadwick
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What is the radius of a typical atom?
1 × 10-10 m
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What is the relative mass and charge of a neutron?
Mass = 1 and charge = 0
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An atom has 13 protons and 14 neutrons. What is its mass number?
27
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An atom has an atomic number of 9 and a mass number of 19. What are its numbers of protons, neutrons and electrons?
Protons = 9, neutrons = 10, electrons = 9
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What are isotopes?
Isotopes are atoms of the same element with different numbers of neutrons.
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Four atoms have the numbers of protons and neutrons given below. Which two atoms are isotopes of the same element? W: 8 protons and 8 neutrons X: 8 protons and 10 neutrons Y: 10 protons and 8 neutrons Z: 9 protons and 10 neutrons
W and X
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What is the best definition of the relative atomic mass of an element?
The average mass of its atoms compared to one-twelfth of the mass of a carbon-12 atom
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A sample of naturally occurring neon is 91% neon-20 and 9% neon-22. What is its relative atomic mass?
20.2.
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Other cards in this set
Card 2
Front
What is the radius of a typical atom?
Back
1 × 10-10 m
Card 3
Front
What is the relative mass and charge of a neutron?
Back
Card 4
Front
An atom has 13 protons and 14 neutrons. What is its mass number?
Back
Card 5
Front
An atom has an atomic number of 9 and a mass number of 19. What are its numbers of protons, neutrons and electrons?
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