These four elements are most likely in group Eriq, a chemist, is running tests with four unknown
elements. He has found that they all bond the same
way, so he knows that they are in the same group on
the periodic table of elements. The table shows other
properties that Eriq observed.
O O O O
17.
Properties of Four Unknown Elements
Element # Melting Boiling Phase at room
point point temperature
1
266 K 332 K liquid
2
172 K 239 K
gas
3
387 K 457 K solid
4
53 K 85K
gas

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

What element is able to combine with itself and hydrogen to form large molecules ?