When moving across a period from left to right in the periodic table (excluding transition elements) which trend occurs?(1 point)
Valence electrons increase by one.
The energy levels increase by one.
Valence electrons decrease by one.
The energy levels decrease by one.
Valence electrons decrease by one.
Which information about an atom can a period number give you?(1 point)
the ionic charge it forms
how many energy levels it has
how many bonds it will make
the number of valence electrons it has