Atoms: They are everywhere

First of all let us think about the size of an atom Atoms are smaller than the seeds on a bun

First of all let us think about the size of an atom Atoms are smaller than the width of thread

First of all let us think about the size of an atom Atoms are smaller than the pixel on a computer screen

First of all let us think about the size of an atom Atoms are smaller than the width of paper

First of all let us think about the size of an atom Atoms are smaller than bacteria that live on your hands

How Many Atoms Are In A Person? Around … 8,000,000,000,000,000,000,000,000,000 that’s … eight million-million-million-million-thousand atoms Wow!

What is an Atom? An atom is the smallest unit of matter

Parts of an Atom Nucleus- the center of the atom that contains the mass of the atom (tight and compact Electron cloud: region that surrounds the nucleus that contains most of the space in the atom (spaced out and more space occupied Nucleus Electron Cloud

What is in the Nucleus? Protons- positively charged particles Neutrons- neutrally charged particles

What is in the Electron Cloud? Electrons- smallest of the 3 and has barely any mass; negatively charged

Bohr’s Model of an Atom

Electrons The electron cloud has a number of different rings depending on how many electrons it had 1st Ring-Hold 2 electrons 2nd Ring- Holds 8 electrons 3rd Ring- Holds 18 electrons 4th Ring- Holds 32 electrons