Which of the following elements of the periodic table has atomic number 1?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e Hydrogen.
- Hydrogen is the element that is atomic number 1 on the periodic table.
- Each hydrogen atom has one proton, which means it has a +1 effective nuclear charge.
- Hydrogen is extremely flammable, but it doesn't burn without the presence of oxygen.
- Hydrogen is a clean alternative to methane, also known as natural gas.