Which statement is correct?

the number of electrons of a neutral atom always equals the number of protons.
the number of neutrons always equals the number of protons.
the number of neutrons always equals the number of electrons.
atomic weight is identical to atomic mass.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.