Chemistry Examples

$A c$

Step 1

Find the element $Ac$ on the periodic table.

89	Atomic Number
Ac	Element Symbol
Actinium	Element Name
227	Average Atomic Mass

Step 2

To find the number of protons in $actinium$ , first locate the element on the periodic table. Next, find the atomic number which is located above the element's symbol. Since $actinium$ 's atomic number is $89$ , $Ac$ has $89$ protons.

$89$ protons