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Element X and Y have the following electronic configurations (X and Y are not the correct symbols of the elements.) х Y 2,8,2 2.8.8.2 What is the atomic number of Element Y?
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11 votes
11 votes
Element X and Y have the following electronic configurations (X and Y are not the correct symbols of the elements.)

х
Y
2,8,2
2.8.8.2
What is the atomic number of Element Y?

User Suroh
by
2.7k points

1 Answer

30 votes
30 votes

Answer:

20

Step-by-step explanation:

The atomic number tells you the amount of electrons and protons in an atom so if you add all of the electrons up (2+8+8+2) you get 20.

User BBagi
by
2.9k points
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