Hello guys , am a new to high school physics and chemistry. I have several questions about electric current , atoms etc. Okay so here it goes..:tongue: 1. What is electric potential and potential difference in simple language ? I heard that there are charges in metals and conductors. 2. What makes these charges flow when connected to a battery ? 3. What is electromotive force ? It is said that Proton has a positive charge , Electron has a negative charge. Neutron has no charge. 4. Is it true that proton + electron = neutron considering +1-1=0 ? 5. What does an "unstable nuclei" mean ? I heard that only unstable elements are radioactive. Is it true ? If yes , how ? During a beta decay , a neutron converts itself into a proton and an electron , and the electron is used for the beta ray and the proton gets added to the nucleus. I heard that even after beta decay , the no. of neutrons remain the same as before beta decay. 6. Is this true ? If yes , from where did the extra neutron which converted itself to proton and electron come from ? And how does a neutron convert itself into a proton and an electron ? Please make your language as simple as possible as am new to it. I have many more questions in mind . I have alot of interest in these subjects , but it is that am just new to it. Please help me , am looking for answers. Thanks.