Periodic Table
What is the 3rd element of the periodic table?
Lithium
What is an atom?
The smallest particle of an element. Atomos are made of three different kinds of subatomic particles
What is an example of a physical and chemical change?
Physical
Chopping wood
Ice melting
Tearing paper
Chemical
Cooking and egg
A nail rusting
Burning wood
Fireworks
What is an element?
A pure substance that is made of a single type of atom.
What is oxygen's atomic number?
8
Name 2 properties of metalloids?
shiny or dull
conducts heat + electricity
ductile + malleable
What is an electron?
Have a negative charge (-), and a very tiny mass of 0.005 amu.
What is matter?
It’s anything that has mass and takes up space.
What is a compound?
Is a pure substance formed when two or more elements are chemically combined.
What is an example of a chemical property?
Rustiness
Flammability
What family is potassium in?
Akali
What is amu?
atomic mass unit
What's an endothermic reaction?
When a reaction absorbs heat from its surroundings.
What is an example of a homogenous mixture?
Lemonade, Pudding, Air
How many families are in the periodic table?
8