Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/17

Click to flip

17 Cards in this Set

  • Front
  • Back

A proton has a mass of

1

A proton has a charge of

+1

A neutron has a mass of

1

A neutron has a charge of

0

An electron has a mass of

almost 0

An electron has a charge of

-1

the atoms of an element conatain ________ protons and electrons

equal

Atomic number =

number of protons

How many protons does Lithium have

3


Atomic number = 3

How many protons does Chlorine have

17


Atomic number = 17

The mass of an atom is

number of protons + number of neutrons

Aluminium has a mass number 27


and an atomic number of 13


calculate the number of protons, neutrons and electrons

protons 13


electrons 13


neutrons 14

Electron are arranged in...

Energy levels (Energy rings)

The first energy level can hold...

2 electrons

The second energy level can hold...

8 electrons

The third energy level can hold...

8 electrons

Protons (atomic number) - electrons =

charge