Chemistry - Atom

An ​ (a)   is a substance that cannot be ​ (b)   into a simpler substance. It is made up of one type of ​ (c)   only.

• element
• broken down
• atom

Elements are arranged in the ​ (a)   .

The atoms are made up of very small particles known as ​ (b)   . There are 3 type: Positive ones - ​ (c)   , negative ones - ​ (d)   , and ​ (e)  

• periodic table
• subatomic particles
• Protons
• electrons
• neutrons

Which sub atomic particles are found in atom nucleus:

• protons

• neutrons

• electrons

Which sub atomic particles are found in atom shells:

• protons

• neutrons

• electrons

Which sub atomic particles have a mass of 1/1840:

• protons

• neutrons

• electrons

Which sub atomic particles have a mass of 1:

• protons

• neutrons

• electrons

Which sub atomic particle has symbol "p":

• protons

• neutrons

• electrons

Which sub atomic particle has symbol "n":

• protons

• neutrons

• electrons

Which sub atomic particle has symbol "e-":

• protons

• neutrons

• electrons

Which sub atomic particle has charge -1 :

• protons

• neutrons

• electrons