Atoms
What part of an atom has a positive charge and what part of an atom has a neutral charge?
A proton & A neutron
2/3 of the elements are ___________?
Metals
Mendeleev created the __________________ _____________ of __________________
Periodic table of elements
______________ cannot be created or destroyed.
______________ is anything that has mass and takes up space.
Matter
________________ have negative charges and arrange themselves in _____________ around the nucleas.
Electrons & Shells
DAILY DOUBLE
How much do you bet?
What is the scientific formula for Carbon Dioxide?
CO2
Mendeleev organized the periodic table of elements according to increasing
What is atomic mass?
Is a piece of clay molded into a teddy bear a physical or chemical change?
A physical change
In order to stabilize their outer shells, some atoms combine with other atoms and ____________ or give and take ________________.
Share & Electrons
The elements silver and copper are the best _______________
Conductors
Mendeleev organized the elements from lightest to heaviest in _________________ rows.
Horizontal
Is a piece of dry ice sublimating into gas a physical or chemical change
A physical change
Two or more atoms chemically combined are called __________________
Molecules or Compounds
What is a pure substance that cannot be broken down more?
An element
Mendeleev started a new row on the periodic table when the ____________ of an element matched those of the element at the beginning of the row.
Properties
Is the color of an iron bar changing as a result of it rusting a physical or chemical change?
A chemical change
What is a charged atom called?
An ion
Name the four characteristics of metals
Shiny, ductile, conductive and malleable
What are the letters that represent an element on the periodic table called?
Atomic Symbol
What are the 4 indicators of a chemical change?
1. An unpredictable phase change occurs 2. Heat or light is produced 3. A gas is produced 4. There is a color change