chemistry unit test Flashcards
(22 cards)
Element definiton
A pure substance made up of only one type of atom, cannot be broken down into simpler substances
Compound definition
A pure substance made up of two or more elements chemically combined in a fixed proportion
Homogeneous definition
A sample of matter with only one phase
Heterogeneous definition
A sample of matter with two or more phases
Matter definition
Anything that has mass and volume
Melting point
The temperature at which a solid turns into a liquid
Freezing point
The temperature at which a liquid turns to a solid
Melting point and freezing point?
The melting point and freezing point are always the same temperature
Boiling point definition
The temperature at which a liquid turns to a gas
Condensing point definiton
The temperature at which a gas changes to a liquid always the same temperature as the boiling point
What is energy?
The ability to do work or make things work
3 physical properties of water
Low viscosity
Liquid ( room temp)
Colourless
electron definition
the negative subatomic particle found in the orbits outside of the nucleus
molecule definition
two or more atoms chemically linked
periodic table definition
the arrangement of elements according to structures and properties
what are the horizontal rows of the periodic table called?
period
what are the vertical column of the periodic table called
groups or families
metal description
- malleable
- good conductors of heat / electricity
- silver and solid
- shiny
- ductile
non metal description
- solid or gas
- dull
- brittle
- poor conductors
where are metals located on the periodic table
left side of the staircase
where are non metals located on the periodic table?
right side of the staircase
what are metalloids? where are they located? give examples
metalloids have properties of both metals and nonmetals. they are located along the staircase. example: silicon,germanium,arsenic, boron
