Question

TILEF

01:
A single atom element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
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Se

Answer 1

Na

Step-by-step explanation:

sodium has mass number 23 and atomic number 11 so number of protons =number of electrons =atomic number which is 11 and number of neutrons=mass number-number of protons =23-11=12