Which statement is true concerning the d-block?(transition metals)
O
it contains 5 groups and has a maximum of 10 electrons
O
It contains 5 orbitals and has a maximum of 10 electrons
O
it contains 10 groups and has a maximum of 5 electrons
O
contains 5 orbitals and 5 groups

Embryos of different species look very similar, which shows that the organisms share a ancestor.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .