Chemistry P1 - Atomic Structure and the Periodic Table Flashcards
Define what a compound is
Two or more elements Chemically combined
Define what a mixture is
Two or more substances in any quantity
Define what relative atomic mass is
An average of the atomic masses of all the isotopes of an element taking into account the relative abundances/percentage of each isotope
How are elements arranged in the periodic table
In order of reactivity
Why do elements in the same group of the periodic table have similar chemical properties
They have the same number of electrons on the outer shell
The elements in group 0 are known as the:
Noble gasses
The elements in group 1 are known as the:
Alkali Metals
The elements in group 7 are known as the:
Halogens
What is an atom
The smallest part of an element that can exist
What is on the left and right of a chemical equation?
Left: reactants Right: products
How is an element different to a compound
A compound
What is the equation for Neutrons?
Number of neutrons = mass number - atomic number
How are the groups arranged?
By number of electrons on the outer shell: 1 electron = group 1
Do melting and boiling points increase or decrease down the alkali metals?
Decrease
