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The atomic number increases as one go across a period.

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10y ago

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What happens to the atomic number as you move across a period?

.The atomic mass increases 


What happens to the reactivity of elements in group a as atomic number increase across a period?

they do becaused they want to do it


How does the atomic number change in a period?

When going left to right across a period, the atomic number of element increases.


When looking across a period of the periodic table from left to right when happens to the atomic number and electronegativity?

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.


What stays the same across a period on the periodic table?

the atomic number.


When moving across a period in the periodic table?

The atomic number increases


What do you noticed about the atomic number in each period?

Atomic number increases from left to right across a period.


An increase in the atomic number the atomic radius moving from left to right across a period.?

decreases


Why does atomic size increase from left to right across a period?

atomic size decreases across a period


As you move across a period of the periodic table from left to right what happens to the number of protons contained by each element?

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 same number of?

Elements across a series have the same number of attributes or characteristics.


What happens to the atomic mass as you go across a period from left to right?

It generally goes up, though there are exceptions.