How many atoms of nitrogen are in a chemical formula Ni(NO3)2?
O 3
O 2
O 1
O 6

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Isotopes of the same element have differ in their

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.