^3^
the diagram illustrates radioactive decay.
which statement correctly identifies structures 1 and 2 in the diagram?
structure 1 is an unstable atom that turns into structure 2, a new atom.
structure 1 is a stable element that breaks down into structure 2, an unstable element.
structure 1 is a radioactive element that loses particles to create structure 2, released energy.
structure 1 is a radioactive atom that decays into structure 2, half of the original unstable element.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high