[spoken English] 01 - Introduction to atom

• Original video

// You may know that everything is made up of atoms
You probably know that all stuff is made up of atoms

// And the atom itself
and that an atom

// It's a very, very small particle
is a really, really, really, really tiny particle.

// Every atom has a nucleus
Every atom has a core,

// It consists of at least one positively charged particle
which is made up of at least one

// This positively charged particle is called a proton
positively charged particle called a proton,

// Most of the time
and in most cases

// There are also neutral particles called neutrons
some number of neutral particles called neutrons

// The nucleus is surrounded by negatively charged particles that become electrons
That core is surrounded by negatively charged particles called electrons

// The properties of an atom are determined only by the number of protons in the nucleus
The identity of an atom is detemined only by the number of protons in ints nucleus

// Hydrogen is hydrogen , Because it has only one proton
Hydrogen is hydrogen because it has just one proton

// Carbon is carbon because it has 6 Protons
carbon is carbon because it has six

// Gold is gold because it has 79 Protons
gold is gold because it has 79

// And so on and so forth
and so on

// Allow me to digress for a moment
Indulge me in a momentary tangent

// How do we know the structure of atoms ？
How do we know about atomic structure?

// We can't see protons again 、 neutron 、 Or electronic
We can’t see protons, neutrons, or electrons

// therefore , We did a lot of experiments
So, we do a bunch of experiments

// Then construct a model that we think is right
and develop a model for what we think is there