What do they look like? Tree swallows are small birds (about 14 cm long) with long wings and small legs and feet. They are irridescent greenish-blue on their head, shoulders and back, and white their chin, breast and belly. Tree swallows have a short black beak and dark brownish feet.
Ernest Rutherford concluded that an atom contains a very small, dense center, called a nucleus, with a positive charge as a result of his gold foil experiment.
It is the nucleus of an atom that is positively charged. You'll recall that an atom is made up of protons, neutrons and electrons (hydrogen-1 excepted). And the protons and neutrons hang out in the nucleus, giving it an overall positive charge because the proton has a positive change. It is the <b>nucleus</b> of an atom that is positively charged. You'll recall that an atom is made up of protons, neutrons and electrons (hydrogen-1 excepted). And the protons and neutrons hang out in the nucleus, giving it an overall positive charge because the proton has a positive change.