Atomic Structure- Part 1: Question Preview (ID: 1254)

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Who named the smallest particle in matter as atomos?
a) Dalton b) Democritus c) Aristotle d) Rutherford
Which of the following is a part of Dalton's atomic theory?
a) All elements are composed of atoms. b) In a particular compound, atoms of different elements always combine in the same way. c) All atoms of the same element have the same mass. d) All of the above.
Who's model provided the first evidence that atoms can be divided into smaller particles?
a) Dalton b) Rutherford c) Thomson d) Bohr
Which experiment provided evidence for the existence of nucleus in an atom?
a) The gold foil experiment b) The Cathode ray experiment c) The oil drop experiment d) The Canal ray experiment
What happens when electrons absob energy?
a) Stay in the same energy level b) Move to a lower energy level c) Move randomly to a higher or a lower energy level d) Move to a higher energy level
How would you find the number of neutrons in an atom?
a) Add the numebr of protons and electrons together. b) Subtract its atomic number from the mass number. c) Subtract its mass number from the atomic number. d) Add the number of electrons and the atomic number together.
What is the maximum number of orbitals and electrons at the 2nd energy level?
a) 9 orbitals and 18 electrons. b) 1 orbital and 2 electrons. c) 3 orbitals and 6 electrons. d) 4 orbitals and 8 electrons.
How are the isotopes of an element different from one another?
a) have same atomic number but different mass numbers. b) have same mass number but different atomic number. c) have same number of protons but different number of neutrons. d) Both answers 1 and 3.
What does an electron cloud represent in an atom?
a) Most probable locations of nucleus in the atom. b) Most probable locations of neutrons in the atom. c) Most probable locations of electrons in the atom. d) Most probable locations of protons in the atom.
Which particle has a mass which is approximately 1/2000 that of a proton?
a) neutron b) electron c) gluons d) none of the above
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