Never trust an atom… they make up everything!
Which Greek philosopher coined the word atomos, meaning “indivisible”?
Who is Democritus
Thomson’s atomic model is often called the:
What is Plum pudding model
The mass number of an atom equals the total number of:
What are Protons and neutrons
This atom has equal numbers of protons and electrons.
What is neutral atom?
Niels Bohr explained that electrons move in specific:
What is Energy levels
J. J. Thomson is best known for discovering the:
What is Electron
Ernest Rutherford concluded that most of the atom is:
What is Empty space
Carbon-14 has 6 protons and 8 neutrons. Its mass number is:
What is 14
The number of valence electrons helps determine an element’s:
What is Chemical properties?
Isotopes of an element differ in their number of:
What is Neutrons
The atomic number of an element is determined by the number of:
What are Protons?
Rutherford discovered that the center of the atom contains the:
What is Nucleus
The Center of an atom contains this:
What is Nucleus?
Atomic mass is usually shown on the periodic table as a:
What is a Decimal number
According to John Dalton, atoms of the same element are:
What is All alike?
Niels Bohr explained that electrons move in specific:
What are Energy levels?
In the quantum model, electrons are found in regions called:
What is Orbitals?
The electrons in the outermost energy level are called:
What are Valence electrons?
The first energy level can hold a maximum of:
What is 2 electrons?
A neutral atom has:
What is Equal numbers of protons and electrons?
The number of valence electrons helps determine an element’s:
What are Chemical properties?
Electrons in an atom are arranged in specific:
What are Valence electrons?
A ________ has Equal numbers of protons and electrons.
What is a Neutral Atom?
This person is famous for discovering the electron
Who is J.J. Thomson?
Chemical properties of an element are determined by:
What are the number of valence electrons?