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Quizzes from Videos
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Flashcards with illustrations
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Quizzes with illustrations
Flashcards
Q: ATOM
A: smallest particle of an element
Q: DEMOCRITUS
A: He was the 1st person to suggest that atoms existed
Q: DALTON'S ATOMIC THEORY
A: atoms of different elements differ in their physical and chemical properties
THE ATOM
12/22/2010
Q: nucleus
A: the very small center core of an atom
Q: protons
A: have a positive charge and are in the nucleus
Q: neutrons
A: have no charge and are found in the nucleus
Atomic Terms
1/27/2011
Quizzes
Q: alkali metals
A: the highly reactive elements that are the first group on the periodic table
Q: element
A: the reactive metals that make up group 2 on the periodic table
Q: reactive
A: a substance composed of one type of atom
Periodic Table Families
1/6/2011
True/False Quizzes
Q: Samarium is a chemical element with the symbol Sm, atomic number 62.
A: true
Q: Fluorine is the chemical element with atomic number 19, represented by the symbol F.
A: true
Q: Titanium is a chemical element with the symbol Ti and atomic number 22.
A: true
Groups of the periodic table 2
6/13/2011
Q: Both chlorine and bromine are used as disinfectants for drinking water.
A: true
Q: Elemental sulfur is a bright yellow crystalline solid.
A: true
Q: Radium is in the second main group
A: true
Groups of the periodic table 3
6/13/2011
Q: Technetium is the chemical element with atomic number 43 and symbol Tc.
A: true
Q: Osmium is a chemical element;it has the symbol Os and atomic number 76.
A: true
Q: Period 5 contains the heaviest few elements that have biological roles, molybdenum and iodine.
A: true
Groups of the periodic table
6/13/2011