groups
What is the difference between a group and a period?
periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table.
how many periods are there?
seven periods.
What determines what group a element is in?
The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.
how are groups and periods alike?
Atomic number increases as you move down a group or across a period.
What kind of elements is group 18 made up of?
The noble gasses.
how do you know which period an element is suppose to be in?
All of the elements in a period have the same number of atomic orbitals. EX: all the elements in period 3 have 3 orbitals.
Which group is the largest in the periodic table?
The transition metals.
How many elements are in period 7?
26 elements.
how many groups are mostly made up of metals?
thirteen.
Do elements in the same period have to be similar?
No way! Many elements have different kind of properties but are still in the same period.