GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An atom with 6 protons and 5 electrons
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An atom with 5 protons and 6 electrons
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An atom with 5 protons and 5 electrons
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An atom with 6 protons and 6 electrons
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Detailed explanation-1: -A neutral carbon atom will have six protons and six electrons. If it has five electrons, it will become a positively charged atom or a positive ion. Thus, option (a) is correct.
Detailed explanation-2: -In an atom, protons are carriers of positive charges; carriers of negative charges are electrons; protons have no charge. In our case, an atom has 6 neutrons that do not carry a charge; 6 protons, that is, a charge of +6; and 5 electrons, that is, a charge of-5. Then the charge of the carbon ion will be: +6-5 = +1.
Detailed explanation-3: -Moreover, the mass number of the unknown element is 11 (5+6). From the periodic table, it can be identified that the element with atomic number 5 is boron. The chemical symbol for boron is B.