Einsteinium Would be your correct Answer.The electron Configuration [Ra] 7s2 5f8 is Not Valid because Ra is basically 7s2. However, you have Ra 7s2 5f8. You can never repeat an electron.
The answer should be A, the number of electrons increases by 1, from left to right.
Across the periods (horizontal direction) in periodic table, each element has one more electron then the one before it. The number of period determines the number of occupied electron shells of the elements in that period. Which means, period 1 elements have 1 occupied electron shell, period 2 has 2, period 3 has 3 etc.
Therefore, the answer is A, we always go from left to right, and plus since period 2 elements only have 2 occupied electrons so their 2nd electron shell electrons must increase throughout the period.
Answer:
maybe 2.000
Explanation:
if you round up i it is probably 2.0000
