more key terms, and other learning Flashcards
How many electrons fit In the shells
2,8,8,8
How do we calculate the atomic number of an atom
Number of protons
How is the periodic table arranged
In order of atomic number
What are groups on the periodic table called
The columns
How does the number of protons compare to the number of electrons in an atom
They are the same
What are the rows on the periodic table called
The periods
What does the group number tell you about an atom of an element in that group
The number of electrons in the outer shell
What does the period tell you about an atom of an element in that group
The number of shells the atom has
What is meant by a physical change
When the particles rearrange but no new chemicals are formed
Give two examples of physical changes
Changes of state e.g. melting or boiling
Separating mixtures e.g. filtration, distillation
What is a chemical reaction
A reaction where a new substance is made.
The atoms in the original particles rearrange to form new particles
