Atoms, Elements And Compounds Flashcards
What is an atom
The smallest unique particle
What is an element
An element is one type of atom
What is a compound
A compound is two or more things which are chemically bound
What is a mixture
A mixture is two or more things which are not chemically bound
Describe the structure of an atom
A central nucleus containing neutrons and protons, surrounded by electrons in shells
What is the charge and atomic mass on protons, neutrons and electrons
Protons ~ charge=+1 atomic mass =1
Neutrons ~ charge=0 atomic mass = 1
Electrons~ charge= -1 atomic mass =1/2000
What is the atomic number
Atomic number is the number of protons in the nucleus of an atom
What is the mass number/nucleon number
the total number of protons and neutrons in the nucleus of an atom
How do you write the electronic configuration
Number of electrons in the first, second and third shells
For example Mg is 2,8,2
What does the group number of an element tell us
The number of electrons in the outer most shell
Why are group 8 elements special and what is their name
They are called noble gases and they have a full outer shell
What is an isotope
different atoms of the same element that have the same number of protons but different numbers of neutrons
Why do isotopes of the same element have the same chemical properties
isotopes of the same element have the same chemical properties because they have the same number of electrons and therefore the same electronic configuration
