The atomic number increases as one go across a period.
.The atomic mass increases
they do becaused they want to do it
When going left to right across a period, the atomic number of element increases.
As you move across a period from left to right in the periodic table, the atomic number of the elements increases by one with each element. Electronegativity also increases across a period from left to right due to the increasing nuclear charge and decreasing atomic radius, which results in stronger pull on electrons.
the atomic number.
The atomic number increases
Atomic number increases from left to right across a period.
decreases
atomic size decreases across a period
The number of protons contained by each element increases by one as you move across a period of the periodic table from left to right. This is because each element in a period has one more proton in its nucleus than the element before it.
Elements across a series have the same number of attributes or characteristics.
It generally goes up, though there are exceptions.