BBC3 年
What does the periodic table tell us about the elements?
The table shows the melting points of five alkali metals. Use this information to describe how melting point changes in group 1.
BBC4 年
Periodic table of elementsPhysical properties of the group 1 elements
The table shows the melting points of five alkali metals. Use this information to describe how melting point changes in group 1.
Princeton University5 年
Boron, B
Boron is a metal in group IIIA of the periodic table with atomic number 5, an atomic weight of 10.81, and a density of 2.34 Mg/m 3. Its melting point is 2300 C.
Princeton University10 年
Argon, Ar
Argon is an inert gas in group VIII A of the periodic table with atomic number 18, an atomic weight of 39.948, and a density of 1.40 Mg/m 3. In the solid state it forms an fcc crystal with a melting ...