A certain atom has an atomic number of four. How many protons does it have? Chemistry Matter Atomic Number 1 Answer anor277 Jan 23, 2017 If #Z=4#, then the beast has FOUR #"nucular protons"#.....and we can go into more detail. Explanation: If #Z=4#, then the atom is beryllium. How did I know this? Answer link Related questions How can the atomic number be determined? How can the atomic mass of an element be calculated? How do atomic numbers change in the periodic table? What is the atomic mass in hydrogen? What does the atomic number tell us? Why is the atomic number used to identify elements? Why is the atomic number a whole number? Why is atomic number represented by Z? How did Dmitri Mendeleev contribute to the atomic number? How is the atomic number affected by gamma decay? See all questions in Atomic Number Impact of this question 5731 views around the world You can reuse this answer Creative Commons License