Join the growing community of curious minds on IDNLearn.com and get the answers you need. Join our knowledgeable community and access a wealth of reliable answers to your most pressing questions.

The electron configuration of an element is 1s22s2. How many valence electrons does the element have? (1 point) a 1 b 2 c 3 d 4

Sagot :

Answer:

b

Explanation:the shell is 2 so ignore the 1s electrons it is only the level 2 electrons that are valence