MEDIUM
9th CBSE
IMPORTANT
Earn 100

The atomic number of aluminium is 13. What is the number of protons and electrons in Al?

Important Questions on Structure of Atom

MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 12
The atomic number of an element is 16. If its mass number is 34, find the number of neutrons.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 13
Write the number of protons, neutrons and electrons in Mg1224.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 13
Write the number of protons, neutrons and electrons in Al1327.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 13
Write the number of protons, neutrons and electrons in Ar1840.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 13
Write the number of protons, neutrons and electrons in P1531.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 14
A neutral atom contains 8 electrons. If its mass number is 18, what are the numbers of neutrons and protons in this atom?
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 15
Cathode rays consist of negatively charged particles called _____.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 15
The electrons are _____ charged particles. (Neutral / negatively / positively)