Which particle does the yellow ball at position #1 represent?

What terms describes being out of water after being submerged

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

How can an organ, such as the lungs, work for multiple body systems?