Why do you think scientist can use the basic properties of matter to identify an unknown substance?

They can use the properties to test and come to some kind of conslusion about the object because in some way it's gotta correlate back to one of the different properties of matter.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer