For hydrogen the atomic number Z equals:
A1
B2
C3
D4
Answer & Solution
Correct answer: A. 1
1. Its nucleus holds a single proton.
2. The atomic number counts protons.
3. For hydrogen Z is 1.
_Source: NCERT Class 9 Science, Ch 4 'Structure of the Atom'_
Related questions
The mass of carbon is 12 u because it has 6 neutrons and:Atoms with the same mass number but different atomic numbers are:Atoms of the same element with different mass numbers are:Elements are defined by the number of their:The atomic number is denoted by which letter?The mass number is denoted by which letter?The mass number of an atom is the sum of its protons and:Protons and neutrons together are also called: