Elements,compounds and mixtures Flashcards
What is an element
An element is a substance that consists of only one type of atom and it can’t be broken down into anything simpler by chemical means
What is a atom
A atom is the simplest particle of an element that can exist on its own in a stable environment
What is a molecule
A molecule is a petiole that has 2 or more atoms chemically joined together
What is period in the periodic table
A period is a horizontal row in the periodic table
What is a group in the periodic table
A group is vertical column in the periodic table
What does malleable mean
Malleable means can be hammered into shape
What does ductile mean
Ductile means can be drawn into wires
What is a compound
A compound is a substance formed when 2 or more ( different) elements are chemically combined
What is the definition of mixtures
A mixture is 2 or more substances mixed together which are usually easy to separate
Where are the metals and non-metals on the periodic table
The left hand side shows the metals and the right hand side shows the non-metals
Metallic elements are good for what
Conducting electricity
Conducting heat
Are all solids at room temperature except mercury
Usually have high melting and boiling points
Usually malleable and ductile
Shiny solids
Non-metallic elements are
Poor conductors of electricity
Poor conductors of heat
Can be a gas,solid or a liquid at room temperature
Usually have low melting and boiling points
They tend to be soft and brittle except for diamond
Usually dull except diamond
