Compounds and chemical reactions Flashcards
(14 cards)
What is an element
It’s a pure substance made up of only one type of atom
What is an atom
smallest unit than an element is made of
What are groups on the periodic table
The columns
What are periods on the periodic table
Rows
What is the atomic number
It is the number of protons and the number of electrons not combined
What is the mass number
Protons plus electron
How do you calculate the number of neutrons
Mass – atomic number
What is the Valency
Number of bonds each element can make
Steps for naming a compound
Step 1: identify elements in the compound
Step 2: write the name of the metal first
Step 3: if there are two elements it ends with -ide
Step 4: if there are three elements it ends with -ate
What is a molecule
A group of atoms chemically joined together
What is a compound
Two or more atoms from different elements chemically joined together
Mixture
Substances made of different elements/compounds that are NOT chemically joined
What are the seven diatomic molecules
Hydrogen, oxygen, nitrogen, bromine, iodine, fluorine and chlorine
