Question

1
H
Hydrogen
1.008

Atomic number
atomic mass
# of protons
# of neutrons
# of electrons

Answer 1

Here's the information for Hydrogen filled in according to the details you provided:

- **Atomic number**: 1
- **Atomic mass**: 1.008
- **# of protons**: 1
- **# of neutrons**: 0 (Hydrogen typically has no neutrons in its most common isotope, protium)
- **# of electrons**: 1

So, summarizing:

- **Element**: Hydrogen (H)
- **Atomic Number**: 1
- **Atomic Mass**: 1.008
- **# of Protons**: 1
- **# of Neutrons**: 0
- **# of Electrons**: 1