Question

A) the number of protons, electrons and neutrons in a species are equal to 17, 18 and 18 respectively. which of the following will be the proper symbol of this species? i) 1735cl ii) 1735cl– iii)1736cl iv) 1736cl–

Answer 1

Answer:

I think option 2 is the correct answer.

Explanation:

protons - 17

electrons - 18

neutrons - 18

protons = atomic number, so atomic number is 17.

number of electron is one more than proton, so there will be a -ve sign.

mass number = atomic number + number of neutrons

mass number = 17 + 18

mass number = 35

_

therefore, 35 cl is the correct answer.

17

HOPE IT'S HELP....

Answer 2

Answer:

The proper symbol of the species will be ${_{17}^{35}\textrm{Cl}}^{-}$.

Explanation:

Representation of an element in the periodic table:

Any element is represented and placed in the periodic table in the format- $_{Z}^{A}\textrm{X}$;
where X represents the symbol of the element.
A represents the mass number of the element, which is equal to the total number of protons and neutrons present in the atom of the element, and,
Z represents the atomic number of the element, which is equal to the number of protons present in the atom of the element.

An atom, in its neutral state, contains an equal number of protons and electrons, i.e.,
number of protons = number of electrons

Concept of cation and anion:

• If an atom contains more no. of electrons than its protons, then it tends to bear a negative charge over it and is termed an anion. E.g.,  O₂⁻.
• If an atom contains a lesser no. of electrons than its protons, then it tends to bear a positive charge over it and is termed a cation. E.g., Al³⁺.

Calculation:

Given that,
number of neutrons present in the species = 18
number of protons = 17
number of electrons present in the species = 18

As discussed above, the atomic number of an element is based on the number of protons it contains, and, in a periodic table, the atoms are arranged with respect to their increasing atomic numbers.
∴ The element will have an atomic number of 17, and, from the periodic table, we know that it is a chlorine atom.

Now, the mass number of chlorine will be = no. of protons + no. of neutrons, i.e.,
A = 18 + 17 = 35

∵ The element contains one extra electron; it will bear a negative charge and it will be represented as- ${_{17}^{35}\textrm{Cl}}^{-}$.

For more such types of questions, you may refer to the links below:

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https://brainly.in/question/958933

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