unit two atom

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Sample Mind Map

par Rein Vainik

What is matter?

par Selene Weightman

Evolution of the International Metric System of SI Units

par Carlos Camayo Velasco

Matter and Change

par Sara Melendez

What is an atom?

Subatomic Particles

Electron

found outside nucleus (electron cloud)

-1 charge

almost 0 mass

neutral atom if number of protons is equal to electrons

Neutron

separates protons

0 charge

same mass a proton

= to protons + electrons

Proton

attracted to electron

atomic number = number of protons

same mass as neutron

+1 charge

found in nucleus

Smallest particle of an element that possesses the properties of the element

elements are made of atoms

Everything is made of atoms

fundamental building block of matter