Write the atomic symbols for isotopes with the following...

Name: Write the atomic symbols for isotopes with the following characteristics: a. 15 protons and 16 neutrons b. 35 protons and 45 neutrons c. 50 electrons and 72 neutrons d. a chlorine atom with 18 neutrons e. a mercury atom with 122 neutrons
Uploaded: 2023-01-28T19:12:06-08:00
Duration: 9 min 53 s
Channel: Shalini Tyagi
Description: Write the atomic symbols for isotopes with the following characteristics: a. 15 protons and 16 neutrons b. 35 protons and 45 neutrons c. 50 electrons and 72 neutrons d. a chlorine atom with 18 neutrons e. a mercury atom with 122 neutrons

Write the atomic symbols for isotopes with the following characteristics: a. 15 protons and 16 neutrons b. 35 protons and 45 neutrons c. 50 electrons and 72 neutrons d. a chlorine atom with 18 neutrons e. a mercury atom with 122 neutrons

Transcript

00:01 So we have various parts here in first part we have 15 proton and 16 neutrons.

00:19 Okay, so now here we know first of all that atomic number that is equals to number of protons.

00:39 So since the number of protons are 15, that means atomic number is 15.

00:45 Now, mass number.

00:49 So that is given by number of protons plus neutrons.

01:08 So that will be number of protons are 15, number of neutrons are 16, so that will be 31.

01:19 So the symbol or atomic symbol that will be to write the atomic symbol, suppose i have element x.

01:30 So we write the atomic number in lower case and mass number in uppercase.

01:37 This is how we write the symbol.

01:39 So we have here phosphorus p which has atomic number 15 and mass number is 31.

01:53 So this is the required symbol.

01:55 Now, p part.

02:01 We have 35 proton and 45 neutrons.

02:08 So i am just using the symbols.

02:10 P for proton.

02:12 Okay, we can also carry the plus charge here.

02:16 Protons carry positive charge.

02:18 And neutrons are neutral.

02:20 So small n is the symbol for neutron.

02:22 Okay.

02:23 So we can use that also.

02:25 So, in this case also atomic number so that symbol is z so that is equals to the number of protons so that is equals to number of protons we have that is 35 and now mass number so that will be given by number of proton plus neutron so that is 35 plus 45 adding them we will get we will get 80 okay so that is the mass number so now the symbol that will be so a element which has the atomic number 35 that is bromine having atomic number 35 and the mass number is 80.

03:43 Okay, so that is the required atomic symbol.

03:47 C part is 50 electron and 72 neutron.

03:57 So we know that number of electron.

04:02 So in a neutral atom, that is equals to number of protons carrying positive charge.

04:09 Okay electrons carrying negative charge so that number will be equal to number of protons carrying positive charge and this leads to the neutrality of atom right and that number of protons will be further equal to atomic number so this means that atomic number will be 50 and now number of neutrons are given.

04:49 Okay, so i am calculating now mass number.

04:55 Mass number that is equal to number of proton plus neutron...

Question

Write the atomic symbols for isotopes with the following characteristics: a. 15 protons and 16 neutrons b. 35 protons and 45 neutrons c. 50 electrons and 72 neutrons d. a chlorine atom with 18 neutrons e. a mercury atom with 122 neutrons

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