Aneon atom has 10 protons and 10 electrons. the 10 protons have a charge of +10 and the 10 electrons have a charge of −10 . no other particles in the atom have a charge. what is the sum of the charges in the neon atom?

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

the answer to the expression is 83