Question

Calculate no. of electron proton and neutron in di positive ion of 20cl40​

Answer 1

40

Cl

20

electron = 20

proton = 20

neutron = 40 - 20 = 20

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Answer 2

Answer:

Calculating Protons

• Finding the number of protons requires reading the Periodic Table rather than doing any calculations. Whether an atom, an isotope or an ion, the atomic number equals the number of protons. If the atomic number is 18 (argon), the number of protons equals 18. Atomic number 3 (lithium) means the element has 3 protons. Find the atomic number of the element on the Periodic Table to find the number of protons.

Calculating Neutrons

• The mass number of an atom equals the number of protons plus the number of neutrons. Rearranging the equation, the number of neutrons equals the mass number minus the atomic number. Remember, the atomic number equals the number of protons. So, the mass number of lead, 208, minus the atomic number, 82, equals 126. Mathematically speaking, 208-82=126, or 126 neutrons in the most common lead isotope. The isotope lead-204 has 122 neutrons because 204-82=122. A quick caveat: The atomic mass shown on the Periodic Table generally shows the weighted average mass of all the isotopes of the element.

Calculating Electrons

• In atoms and isotopes, calculating the number of electrons requires remembering that in a neutral atom or a neutral isotope the positive and negative charges will be equal. In other words, the number of electrons equals the number of protons. Finding the atomic number on the Periodic Table gives not only the number of protons but also the number of electrons in a neutral atom or isotope.

• In an unbalanced atom or isotope, the number of protons doesn't equal the number of electrons. The difference between the two particles results from an imbalance of positive and negative charges. So, an atom with an ionic charge of +2 has two more protons than electrons. The element calcium, for example, has atomic number 20 so the atom has 20 protons. The calcium ion with a positive +2 charge has two more protons than electrons. Calculating the number of electrons becomes 20-2=18, or 18 electrons. On the other side of the Periodic Table, fluorine, atomic number 9, has 9 protons and often forms an ion with a -1 charge by adding an extra electron to its outer shell. In this case, the atom has one more negative electron than positive protons. Mathematically, calculate the total number of electrons by adding one electron to the number of protons, 9+1=10. Therefore, the fluorine ion has 9 protons and 10 electrons

Explanation:

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