Grade 9 Review Flashcards
Matter
Anything that has mass and takes up volume
Pure Substances
Mixtures
Made of one type of matter, all particles have the same properties
Contains two or more pure substances
Elements
Compounds
Can’t be broken down, one kind of atom, on periodic table
Contains two or more different elements chemically bonded together
Heterogeneous
Homogeneous
Two or more substances can be seen… 2 types: suspension (ex. Salad dressing), mechanical mixture (ex. Chocolate chip cookie)
Looks and feels the same throughout (aka solutions)
Metals
Left side Good conductors Ductile Malleable Shiny and silvery Give electrons All but Mercury are solid at room tempature
Metalloids
Staircase of elements the separate metals and non metals
Properties of both metals and non-metals
Non-Metals
Ride side
Poor conductors
Take electrons
Some solids, some gases (liquid at room temperature)
Alkali Metals
Alkaline Earth Metals
Group 1- soft silvery grey metals, react easily with water and oxygen in air
Group 2- composed of silvery grey metals, harder and more reactive than alkali metals
Halogens Noble Gases (Inert Gas)
Group 17- very reactive coloured non-metals
Group 18- colourless odourless unreactive non-metals
Horizontal Rows
Vertical Columns
Periods (how many shells)
Families or groups
Proton
Neutron
Electron
Symbol: p+, n0, e-
Relative mass: 1,1,1/2000
Charge: +,0,-
Location: in the nucleus, in the nucleus, orbits/shells/energy levels
Ionic compounds
Overall charge of the compound is zero (-2,+2)
Positive and negative ions are attracted to each other because they’re opposite charges
Classification of Matter
->Matter
->Pure Substances-Mixtures
->Elements-compounds
Heterogeneous-homogeneous
Chemistry
The study of matter, its properties, and its changes or transformations
