The graph below compares the densities of seven different metals. DENSITIES OF SOME METALS
14
10
Density (g/cm)
VO
N
Titanium
Aluminum
Zirconium
Iron
Zinc
Lead
Mercury
Material
Based on information from the graph, which statement best compares the densities of
two metals?
F. Ten kilograms of aluminum is denser than one kilogram of titanium.
G. Any sample of zirconium is denser than any sample of titanium.
H. Five kilograms of iron is denser than one kilogram of lead.
1. Any sample of zinc is denser than any sample of iron.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

it's c. elements are placed in rows based on how may valencies electrons have.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.