What is the charge on a hypothetical ion with 25 protons and 29 electrons?

Which characteristics can be used to differentiate star systems? check all that apply.

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope