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(will give brainliest!! please help me! thank you!)

a) The rows on the periodic table are called periods. How many energy levels are in the atoms of each element in period 2 (lithium-neon)

b) What is the group number of the halogens?

c) What do the elements in each group have in common?


please please help me, i will give brainliest

Sagot :

arslanamir186

Answer:

A two energy levels K and L

B halogen are present in group 17

C in same group elements have same valence electrons

Explanation:

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