17 Questions
What is the atomic number of an atom?
The number of protons
Which sub-atomic particle is not accounted for in the atomic number?
Neutrons
What does the mass number represent in an atom?
The sum of protons and neutrons
Which element has an atomic number of 6 and a mass number of 12?
Carbon
What does the notation 'A Z x' represent for an element?
Atomic mass, atomic number, symbol
Which of the following best describes a molecule of an element?
Consists of only one type of atom
What is the relationship between the mass number and the atomic number in an atom?
Atomic number is less than the mass number
Which sub-atomic particle has a charge but negligible mass?
Electron
What is the main difference between monoatomic and polyatomic molecules?
Number of different types of atoms
Which Greek philosopher first proposed the idea of 'atoms'?
Democritus
What is the atomic number of an element?
Number of protons only
What is the relationship between the number of protons, electrons, and atomic number in an atom?
Number of protons = Number of electrons = Atomic number
Which subatomic particle is responsible for the mass of an atom?
Neutron
How can you calculate the number of neutrons in an atom?
Number of neutrons = Mass number - Atomic number
In an atom with 8 protons, how many electrons are present?
8
What is the relationship between the mass number and atomic number in an atom?
Mass number > Atomic number
If an element has 6 protons and 6 neutrons, what is its atomic number?
6
Test your knowledge on determining atomic numbers and mass numbers of common elements by using the periodic table. This quiz is based on the General Science Grade 8 Student Textbook.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
