Question

1.As with any grid, the periodic table has ________ (left to right) and __________ (up and down).

2.Every row is called a ___________.
3.All the elements in the same period have the same number of _______.
Each column is called a __________.
4.The elements in each group have the _________ number of electrons in the outer orbital (or valence electrons).
5.Noble gases and helium are considered “happy” because their ______________ shell is ___________.

this was not a multiple-choice its about the periodic table

Answer 1

1. rows and columns
2. period
3. atomic orbitals

• valence electrons

4.similar properties

5.electrons are very reactive

• the outermost