C3 Flashcards
What are the three states of matter
Solid
Liquid
Gases
What is the particle theory used to explain
The properties of solids, liquids and gases
What do elements react to form
Compounds by gaining or losing electrons
How can you tell that the compound h2o has covalent bonds
When metallic elements react with non-metallic elements they produce ionic compounds
What is ionic bonding
ionic Compounds that are held together by strong forces of attraction between their oppositely charged ions
Do ionic compounds have high or low melting point
High
Why do ionic compounds conduct electricity when molten or dissolved in water?
This is because thei ions can then become mobile and can carry charge through the liquid
When are covalent bonds formed
When atoms of non-metals share pairs of electrons with each other
Each shared pair of electrons is a…
Covalent bond
Description of substances containing covalent bonds
Conists of simple molecules but some have giants covalent structures
Do substances made up of small molecules have low or high boiling and metling point?
Low melting points and low boiling point
The forces between simples molecules are…
Weak
Why do SIMPLE BMOLECULES HAVE LOW BOILING AND MELTING POINTS
THEY HAVE WEAK INTERMOLECULAR FORCES
Do simple molecules have a charge and what does this mean
No they have no overall charge which means they cannot carry electricity
Substances of simle molecules do not…
Conduct electricity
