Consider the following atoms in which X represents the chemical symbol of the element: (4.5) 8^

Consider the following atoms in which X represents the...

Consider the following atoms in which $\mathrm{X}$ represents the chemical symbol of the element: (4.5) ${ }_{8}^{16} \mathrm{X} \quad{ }_{9}^{16} \mathrm{X} \quad{ }_{10}^{18} \mathrm{X} \quad{ }_{8}^{17} \mathrm{X} \quad{ }_{8}^{18} \mathrm{X}$ a. What atoms have the same number of protons? b. Which atoms are isotopes? Of what element? c. Which atoms have the same mass number?

Consider the following atoms in which $\mathrm{X}$ represents the chemical symbol of the element: (4.5)
${ }_{8}^{16} \mathrm{X} \quad{ }_{9}^{16} \mathrm{X} \quad{ }_{10}^{18} \mathrm{X} \quad{ }_{8}^{17} \mathrm{X} \quad{ }_{8}^{18} \mathrm{X}$
a. What atoms have the same number of protons?
b. Which atoms are isotopes? Of what element?
c. Which atoms have the same mass number?

Key Concepts

Atomic Number

The atomic number represents the number of protons in an atom's nucleus. It is a fundamental property that determines the identity of an element and influences its chemical behavior. Atoms with the same atomic number are the same element, regardless of the number of neutrons present.

Mass Number

The mass number is the total count of protons and neutrons in an atom's nucleus. It provides a measure of the atomic mass of an isotope and is used to distinguish between different isotopes of the same element, since isotopes have the same number of protons but different numbers of neutrons.

Isotopes

Isotopes are variants of the same chemical element that have the same number of protons but different numbers of neutrons. This difference in neutrons results in different mass numbers for the isotopes even though the elemental identity remains unchanged. Understanding isotopes is crucial when comparing atomic masses and assessing nuclear reactions or decay processes.

Transcript

00:01 Hello.

00:02 In this question, we have been given chemical symbols of five different elements, and they are denoted like this.

00:13 So, first one is x860, next is x916, third one is x10 -18, fourth one is x -8 -70, fifth one is x -8 -80.

00:41 Right? before we go ahead with the questions, let's try to find the number of protons, neutrons and electrons for each one.

00:52 So, protons, electrons, electrons, okay? so, proton is basically equal to the atomic number of the entity.

01:00 See here, the atomic number is 8.

01:02 So it will have 8 protons.

01:04 Similarly, what is the number of electrons? the number of electrons is equal to number of protons.

01:09 So it will also be 8.

01:11 Then what is neutron number? neutron number will be the mass number minus the atomic number, which will be 16 minus 8 in this case.

01:21 Okay, let's calculate for this as well.

01:23 So the number of protons will be 9 and then electrons will also be 9.

01:26 Then neutrons will be 16 minus 9.

01:30 So we have to calculate 16 minus 9, which is 7.

01:40 Then we go to this one.

01:44 So here it will be 10, 10 and 8.

01:51 Then here it will be 8 8 and 17 minus 8 is 9 then next is 8 8 okay so with this knowledge we can try to answer the questions so first question is what atoms have the same number of protons so we look at the number of protons for each one so we can see that so we can see that x 860 x817 and x818 they have the same number of protons right so i'll write it here for the first question the answer will be x816 x817 x817 and x8 18 have the same number of protons let's go to the second question second question is which atoms are isotopes of what element okay so in case they are isotopes, they will have the same number of protons but different number of neutrons...

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