The Periodic Table
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what is the Reactants in a word equation?
The substances that react in a chemical reaction
what are the product in an word equation?
The products are the end result
what are the main groups of the periodic table?
in the periodic table there are noble gases, alkali metals halogens alkali earth metals.
how are elements arranged?
They are ordered in increasing of atomic number
what are atoms, elements and compounds?
elements are made up of atoms chemical formulae can be used to represent compounds
what is a covalent bond?
it is when two electrons are shared between two atoms and create a molecule
What’s an atom?
Atoms are tiny particles which can’t be separated into anything smaller.
What’s an element?
Elements are simple, pure substances made up of only one type of atom.
What’s a compound?
A substance made up of two or more elements chemically joined together.
What are the horizontal and vertical columns of the periodic table called?
Periods and groups.
What are mixtures?
An impure substance made from different elements or compounds mixed together that are not chemically joined.
What happens when you go down group 1 on the periodic table?
The reactivity increases as you go down the Group 1 elements because the atoms get larger.
How do alkali metals react with water?
Alkali metals react with water to produce heat and hydrogen gas. Heavier metals will react more violently with water.