Which element would most likely form metallic bonds

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium. b)heavier than helium. c)the same weight as helium. d)dependent on the element that reacted with carbon.