a single atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it?\nk\nzr\nca\nsc
a single atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it?\nk\nzr\nca\nsc
Answer
Answer:
C. Ca
Explanation:
Step1: Recall atomic number concept
The atomic number of an element is equal to the number of protons in its atom.
Step2: Identify the element
Here, the number of protons is 20. The element with atomic number 20 is calcium (Ca).