C2 Atomic Structure Flashcards
(31 cards)
What are all substances made of
Atoms
What is an atom
The smallest unit of matter than can exist on its own
How many different types of atom are there
92 (naturally occuring)
Where are the different types of atoms listed
The periodic table of elements
What are the vertical columns on the periodic table called
Groups
What are the horizontal rows on the periodic table called
Periods
What is an element
A substance made up of only one type of atom
What are subatomic particles
The particles that make up atoms
Which three subatomic particles are atoms made of
Protons
Neutrons
Electrons
What is found in the centre of an atom
Nucleus
Which subatomic particles are found in the nucleus of the atom
Protons
Neutrons
Where are electrons found in an atom
In shells around the nucleus
What is an atom’s atomic number
The number is protons in an atom
What is an atom’s atomic mass
Number of protons and neutrons added together
What is the maximum number of electrons that can be held in each electron shell
First shell: 2
Second shell: 8
Third shell: 8
What does the group number of the periodic table tell you about the electron arrangement
The number of electrons in the outer shell of an atom
What does the period number tell you about the electron arrangement
The number of shells in an atom
What does the name for the one or two letters that are used to represent a type of atom
Chemical symbol
What form do chemical symbols take
One capital letter and one lowercase letter (if needed)
What is a molecule
A small number of atoms joined together
What do we call the chemical symbols and numbers that tell us how many of each type of atom are in a substance
Chemical formulae
What is the chemical symbol for oxygen
O2 (the two is subscript)
What is the chemical symbol for water
H2O (two is subscript)
