Question

atomic number
1
h
hydrogen
1
atomic mass

Explanation:

Step1: Identify atomic number

The number at the top of the element box represents the atomic number. Here it is 1.

Step2: Identify atomic mass

The number at the bottom of the element box represents the atomic mass (rounded - off value). For hydrogen, it is 1.

Answer:

Atomic number: 1
Atomic mass: 1