![Atomic Number Of The First 20 Elements On The Periodic Table Quiz | Periodic table, Atomic number, Quiz Atomic Number Of The First 20 Elements On The Periodic Table Quiz | Periodic table, Atomic number, Quiz](https://i.pinimg.com/600x315/59/6e/82/596e82982fb8fafe363c3c64939e11ea.jpg)
Atomic Number Of The First 20 Elements On The Periodic Table Quiz | Periodic table, Atomic number, Quiz
![1.13 Deduce the electronic configuration of the first twenty elements from their positions in the periodic table. - iGCSE CHEMISTRY REVISION HELP 1.13 Deduce the electronic configuration of the first twenty elements from their positions in the periodic table. - iGCSE CHEMISTRY REVISION HELP](https://igcsechemistryrevision.weebly.com/uploads/2/4/2/1/24217817/7868437.gif?356)
1.13 Deduce the electronic configuration of the first twenty elements from their positions in the periodic table. - iGCSE CHEMISTRY REVISION HELP
![SOLVED: 'These are the first 20 elements on the periodic table which of these elements had 20 protons in its nucleus (atomic number = 12)? 1. He 2. S 3. Mg 4. SOLVED: 'These are the first 20 elements on the periodic table which of these elements had 20 protons in its nucleus (atomic number = 12)? 1. He 2. S 3. Mg 4.](https://cdn.numerade.com/ask_images/81f8d38ddfeb413a95517912c52a59ca.jpg)