Writing Atomic Symbols - Nuclear Physics - video Dailymotion

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An atom has several electrons, protons, and neutrons. The nucleus, which is the core of an atom, consists of protons and neutrons. The number of protons and neutrons is used in writing atomic symbols. In this series, we will learn how to write atomic symbols.  Example of Atomic Symbols: Write the symbol for an atom that has: a. 10 protons and 12 neutrons b. 42 electrons and 56 neutrons  #NuclearPhysics #Radioactivity

Transcript

00:00Write a symbol for an atom with 10 protons and 12 neutrons, and an atom with 42 protons and 56 neutrons.

00:14Okay.

00:17Here's an atom.

00:21The atomic nucleus is composed of positively charged protons and uncharged neutrons.

00:26The particles that make up the atomic nucleus are known as nucleons.

00:33Therefore, the number of nucleons is the sum of the protons and neutrons.

00:41Surrounding the atomic nucleus are electrons.

00:45In a neutral atom, the number of electrons is equal to the number of protons.

00:50For identification, the atomic nucleus is given a specific letter symbol.

00:59Think of it as X.

01:03Next, the number of protons is written as a subscript to the left or right of X.

01:10Usually to the left.

01:11Meanwhile, the number of nucleons is written as a superscript to the left or right of X.

01:22This is the atomic symbol.

01:25Thus, the atomic symbol can be written as follows.

01:30The Z value is known as the atomic number.

01:32And the A value is known as the mass number.

01:48In the case of A, the atomic number is the number of protons.

01:54So, Z equals 10.

01:56The number of neutrons, A minus Z equals 12.

02:04Plugging in the value of Z.

02:08E equals 22.

02:11Think of it as atom X.

02:14This is the symbol for atom X.

02:20In case B, the atomic number is the number of protons.

02:24So, Z equals 42.

02:29The number of neutrons, A minus Z equals 56.

02:36Plugging in the value of Z.

02:38E equals 98.

02:43Think of it as atom X.

02:46This is the symbol for atom X.

02:51Hopefully, this is helpful.

02:54And don't forget to watch the next video.

02:56See you next time.

Writing Atomic Symbols - Nuclear Physics

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