Periodic Table And Atomic Structure Flashcards
What is an element?
A substance which only contains one kind of atom
Elements can be categorised as what?
Metals and non-metals
Elements with what are grouped together?
Elements with similar chemical properties are grouped together
How are elements arranged in the periodic table?
In order of increasing atomic number
How is the mass number of an atom found?
Adding the masses of the protons and neutrons together
What is the relative atomic mass of an element?
The average mass of one atom of that element
What does APE stand for
Atomic Number=(number of protons)+(number of electrons)
What does MAN stand for
Mass Number=(atomic number)+(number of neutrons)
What charge do protons have
Protons have a positive charge
What charge do neutrons have
Neutrons have no charge
What charge do electrons have
Electrons have a negative charge
What do the number of protons define and what are they also known as?
The number of protons defines an element and is know as the atomic number
What does not have an electrical charge and are said to be neutral?
Atoms
What is the atom called if there is an imbalance in the number of positive protons and negative electrons
An ion
What are isotopes?
Isotopes are atoms of the same element with different mass numbers
