An atom has a mass number of 43 and an
atomic number of 23. How many protons
does it have?

I’m an electrically neutral atomic any element, there are equal numbers of

What occurs when a cell engulfs large food particals

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.