Arrange the following elements in order of decreasing electronegativity: Strontium, Magnesium, Barium, Beryllium, Radium and Calcium.

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

Light waves travel than sound waves.

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?