Atomic Structure Quiz

Who proposed that matter was composed of tiny indivisible particles?

• John Dalton

• Niels Bohr

• Democritus

• Ernest Rutherford

Which scientist discovered radioactivity?

• Democritus

• Henri Becquerel

• J. J. Thomson

• Erwin Schrödinger

Who discovered the nucleus through the Gold Foil Experiment?

• John Dalton

• Henri Becquerel

• Ernest Rutherford

• Niels Bohr

Who proposed the Plum-pudding Model of the atom?

• J. J. Thomson

• Erwin Schrödinger

• Ernest Rutherford

• Democritus

Which scientist discovered neutrons?

• James Chadwick

• Ernest Rutherford

• J. J. Thomson

• Henri Becquerel

What is the atomic number of an element?

• Number of electrons in the electron cloud

• Number of neutrons in the nucleus

• Number of electrons in the nucleus

• Number of protons in the nucleus

Which family of elements is known for being soft, shiny, and reacting violently with water?

• Alkali Metals

• Alkaline Earth Metals

• Boron Family

• Carbon Family

Which group of elements is a mixture of metals, nonmetals, and metalloids with 5 valence electrons?

• Nitrogen Family

• Oxygen Family

• Halogens

• Noble Gases

What is the metallic character of the elements in Group 17 (7A)?

• Very reactive

• Un-reactive

• Good conductors of heat and electricity

• Exist as single atom gases

Who organized elements by increasing atomic number and fixed problems in Mendeleev’s arrangement?

• Henry Mosely

• Dmitri Mendeleev

• John Dalton

• Democritus