The Periodic Table Flashcards
What are the rows of the periodic table called?
Periods
How are the elements arranged in each row?
In order of increasing atomic number
The period number is the same as —- ?
The number of electron shells.
E.g the period 3 elements have 3 electron shells
True or false, the properties of elements change as you go along a period?
True
What are the columns of the periodic table called?
Groups
What is similar about the elements in the same group?
They have similar properties. This is because they have the same number of electrons in their outer shell.
What is the group number always equal to?
The number of electrons in the outer shel.
True or false, the properties of elements often stay the same as you go down a group?
False.
The properties of elements often gradually change as you go down a group.
What two categories is the Periodic Table arranged into?
Periods and groups