Which is a characteristic of the part of the atom marked "A"?

It contains most of the mass.
It is negatively charged
It is mostly empty space.
It is composed of electrons.

Is there any danger to eating mold?

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

Which event would lead to primary succession of a forest?