Electrons:

• Have a symbol of the letter "e" with a negative sign
• Have a relative charge of negative 1
• Have a 1 : 1836 relative mass
• Have an actual mass of 9.11 times 10 to the negative 28th power
• Have a yellow model color

Protons:

• Have a symbol of the letter "p" with a positive sign
• Have a relative charge of plus 1
• Have a relative mass of 1
• Have an actual mass of 1.674 times 10 to the negative 24th power
• Have a yellow green color

Neutrons:

• Have a symbol of the letter "n"
• Have a relative charge of 0
• Have a relative mass of 1
• Have an actual mass of 1.675 times 10 to the negative 24th power
• Have a purple model color