Write the atomic symbol for the isotope with each of the...

Name: Write the atomic symbol for the isotope with each of the following characteristics: a. an oxygen atom with 10 neutrons b. 4 protons and 5 neutrons c. 25 electrons and 28 neutrons d. a mass number of 24 and 13 neutrons e. a nickel atom with 32 neutrons
Uploaded: 2022-01-01T21:55:16-08:00
Duration: 4 min 32 s
Channel: Jennifer Hudspeth
Description: Write the atomic symbol for the isotope with each of the following characteristics: a. an oxygen atom with 10 neutrons b. 4 protons and 5 neutrons c. 25 electrons and 28 neutrons d. a mass number of 24 and 13 neutrons e. a nickel atom with 32 neutrons

Write the atomic symbol for the isotope with each of the following characteristics: a. an oxygen atom with 10 neutrons b. 4 protons and 5 neutrons c. 25 electrons and 28 neutrons d. a mass number of 24 and 13 neutrons e. a nickel atom with 32 neutrons

Transcript

00:02 Hi there.

00:03 In this question, we are asked to write the atomic symbol for five different isotopes.

00:09 And so before we get started, let's review a little bit of information.

00:13 First of all, let's talk about the atomic number.

00:16 We can find the atomic number on the periodic table.

00:22 And the atomic number of each element tells you the number of protons in the nucleus of each atom of that type of element.

00:34 So the atomic number is the number of protons, and in a neutral atom, since protons are positive, and electrons are negative, to have a neutral atom, this is also going to be the number of electrons.

00:50 Now, if it's an ion, the number of electrons will differ from the number of protons.

00:56 But all of these we are assuming are just neutral isotopes because it's not telling us otherwise.

01:01 So the atomic number gives us the number of protons and the number of electrons.

01:07 The mass number is the sum of the number of protons plus the number of neutrons.

01:20 So protons plus neutrons give us mass number.

01:23 Okay, armed with this information, let's go ahead and get started.

01:27 In letter a, we have an oxygen atom.

01:30 So we're going to write the o for oxygen.

01:32 Looking at the periodic table, we see that its atomic number is 8, which is right.

01:37 And has a subscript before the symbol.

01:40 And this has 10 neutrons.

01:42 So since it has an atomic number of 8, that means 8 protons.

01:48 And we're told it has 10 neutrons.

01:51 So its mass number is 18 because we just had to add 8 and 10 together to give us 18.

02:03 Okay, so this would be the symbol for this first isotope.

02:08 Remember isotopes are atoms of the same element that have different mass numbers.

02:13 So that's all this means here for isotope is that the mass number might differ from what you're used to for a particular element...

Question

Write the atomic symbol for the isotope with each of the following characteristics: a. an oxygen atom with 10 neutrons b. 4 protons and 5 neutrons c. 25 electrons and 28 neutrons d. a mass number of 24 and 13 neutrons e. a nickel atom with 32 neutrons

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