Which of the following CAN NOT be the maximum number of electrons in a given shellaccording to the Bohr & Bury’s rule for electronic configuration:
  • (a) 2
  • (b) 6
  • (c) 18
  • (d) 32
The atomic number of sodium (Na) is 11. How many valence electrons does sodiumhave?
  • (a) 1
  • b) 2
  • (c) 7
  • (d) 8
The atomic number of Sulphur (S) is 16. Identify the number of electrons in each shell ofSulphur.
  • (a)2, 8, 6
  • (b)2, 8, 8
  • (c)2, 2, 8, 4
  • (d)2, 4, 8, 2
Which elements have a valency of 2?
  • (a) Be and Si
  • (b) Si and Cl
  • (c) Be and O
  • (d) Cl and O
Which element would be inert in nature?
  • (a) Element with 2 electrons
  • (b) Element with 9 electrons
  • (c) Element with 12 electrons
  • (d) Element with 20 electrons
The image shows the scientific notation of sodium. What is the atomic mass of Na?
  • (a)11
  • (b)12
  • (c)23
  • (d)34
The subatomic particle that determines the identity of an element.
  • neutron
  • proton
  • electron
  • outer shell
What is the mass number and name of an element with 8 protons and 8 neutrons?
  • 16 - Carbon
  • 16 - Oxygen
  • 24 - Oxygen
  • 8 - Neon
An element with a mass number of 10 and an atomic number of 6 has how many protons?
  • 5
  • 8
  • 6
  • 10
What is the atomic number of the atom pictured?
  • 11
  • 12
  • 22
  • 23
How many protons, electrons and neutrons does an neutral atom of Calcium have? Its atomic number is 20 and the mass number is 40.
  • 20 protons, 18 electrons and 40 neutrons
  • 20 protons, 20 electrons and 20 neutrons
  • 40 protons, 40 electrons and 20 neutrons
  • 20 protons, 18 electrons and 20 neutrons
Ag--110 and Ag--112 are two forms of silver with different mass # so they are
  • compounds
  • isotopes
  • orbitals
  • neutrons
What is the mass number of this element?
  • 5
  • 27
  • 32
  • 59
Thompson was the first to discover a subatomic particle - the electron. What are the others?
  • neutrons & positrons
  • protons & neutrons
  • positrons & quarks
  • protons & positrons
Rutherford concluded that the amount of positive charge varies
  • with the amount of electrons in the nucleus.
  • as the the amount of isotopes varies.
  • with the amount of neutrons in the nucleus.
  • with different elements.
The word "electron" comes from the ancient Greek word meaning
  • amber.
  • to change or become flexible.
  • elektron.
  • electricity.
Electrons can best be described as having a
  • large size, positive charge.
  • very small size, positive charge.
  • large size, negative charge.
  • very small size, negative charge.
Neutrons have almost exactly the same mass as
  • electrons.
  • positrons.
  • protons.
  • quarks.
James Dalton proved that the true nature of the atom could best be described as resembling "plum pudding."
  • True
  • False
Which statement best describes an isotope of an element?
  • they share an equal amount of neutrons
  • they have the same atomic #'s but with different mass #'s
  • they have the same mass #'s but with different atomic #'s
  • they have a different # (number) of protons
0 h : 0 m : 1 s

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