Flashcards
Atomic Structure
Flashcards do conjunto (10)
- 1What is the plum pudding model of the atom?An atom is a ball of positive charge with negative electrons embedded in it
- 2Which scientist found evidence for the existence of neutrons?James Chadwick
- 3What is the radius of a typical atom?1 x 10^-10
- 4What is the relative mass and charge of a neutron?Mass = 1 and charge = 0
- 5An atom has 13 protons and 14 neutrons. What is its mass number?27
- 6An 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
- 7What are isotopes?Isotopes are atoms of the same element with different numbers of neutrons
- 8Four 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 neutronsW and X
- 9What is the best definition of the relative atomic mass of an element?Relative atomic mass is the average mass of the atoms of an element compared to one-twelfth of the mass of a carbon-12 atom
- 10A 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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- Year 9 Chemistry (Monitoring 4 - Y9) FlashCards sobre Atomic Structure, criado por Holly Martin em 25-04-2018.
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- Holly Martin
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