Consider two carbon atoms one represented as 14c and the...

Consider two carbon atoms, one represented as $^{14}C$ and the other as $^{12}C$. Which statement is true regarding these two atoms? These carbon atoms have different numbers of electrons. These carbon atoms have the same number of protons. These carbon atoms have different numbers of protons. These carbon atoms have the same number of neutrons.

Transcript

00:02 Hi there.

00:03 In this question, we're told that we have atom a and we have atom b.

00:09 And we're also told they have the same number of protons.

00:12 So if they have the same number of protons, they are going to have the same atomic number.

00:22 And if they have the same atomic number, that means they are the same element because the number of protons determines the identity of an atom.

00:34 So they have the same number of protons.

00:36 They also have the same number of neutrons.

00:38 So mass number, is the sum of the protons plus neutrons.

00:44 So if they have the same number of protons and the same number of neutrons, a and b are going to have the same mass number.

01:04 All right.

01:04 However, we are told they do not have the same number of electrons.

01:11 So therefore, electrons determine the charge.

01:16 If we have the same number of electrons as the number of protons, it'll be neutral.

01:20 But if we have a different number of electrons than we have protons, the atom will have a charge.

01:28 It will be an ion.

01:30 So for the charge, on a, i'm just going to put the letter j, and on b, i'm going to put the letter k, to show that since they have a different number of electrons, they have different charges.

01:40 One of them could be neutral, and the other have a charge, but at any right, j and k are not going to be the same.

01:47 So we want to know which of these statements, and we have four of them, we want to know which of these statements describe these two atoms.

01:58 The first one says they have the same chemical symbol.

02:02 Well, we've already identified the fact that they are the same element, since they have the same number of protons...

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