Chemistry C1 Flashcards
What are all substances made up of ?
Atoms
Define an element.
Substances that are only made up of only one type of atom.
What are the columns in periodic table called ?
Groups
What are the rows going across called?
Periods
Define a compound.
Different types of atoms chemically bonded together .
What are all atoms made up of ?
A nucleas , electrons , protons and neutrons .
What is a reactant in a chemical equation?
The substance you start with .
What are the products in a chemical equation ?
The new substances made in the reaction .
Can atoms be created or destroyed ? ( yes or no)
No the cannot.
What is meant by the law of conservation of mass ?
The total mass of products formed in a reaction is equal to the total mass of the reactants.
Define a mixture.
A mixture is made up of two or more substances(elements or compounds ) that are not chemically bonded together .
Define the word composition .
This specifies the identity or the arrangement of the chemical elements .
What are the four seperation techniques called ?
Filtration
Crystilisation
Distilation
Chromatography
What is a solvent ?
Any substance that is capable of dissolving one or several substances .
What is a solute ?
A substance that is dissolved in a solution
