Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Which element has

(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2, 8, 2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?

Science - Science

Chapter_Periodic Classification of Elements


B) MAGNESIUM has  EC 2,8,2
0 0 0
Answer :
a. Helium, Neon, Argon, Krypton, Zenon, Radon.
b. Magnesium
c. Silicon
d. Boron
e. Beryllium
Hope you've got your answers. You could give that a 5 star and mark as the best answer.

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts