Question

if an atom has 4 protons, 3 neutrons and 4 electrons, then this is an atom of... periodic table of the elements image of periodic table options: hydrogen, helium, beryllium, nitrogen

Explanation:

Step1: Recall atomic number definition

The atomic number of an element is equal to the number of protons in its atom. So, if an atom has 4 protons, its atomic number is 4.

Step2: Identify element by atomic number

Looking at the periodic table, the element with atomic number 4 is beryllium. Hydrogen has atomic number 1, helium has atomic number 2, and nitrogen has atomic number 7.

Answer:

beryllium (the option corresponding to beryllium, e.g., if the options are as given: the option with "beryllium")