a. Name the element with atomic number 17.
b. To which period does it belong to?
c. To which group does it belong to?
d. Write its electronic configuration
Answers
Answer:
chlorine
Explanation:
group 2
period 17
Required Answers:-
a. The element with atomic number 17 in the periodic table is Chlorine (Cl)
b. The element belongs to 2nd period in the periodic table.
c. The element belongs to the 17th group of the periodic table.
d. We know that, the no. of electrons of an element = Atomic number of that element. Hence number of electrons in Chlorine is 17.
Electronic configuration = (2, 8, 7)
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Explore More!!!
→ What are groups in a periodic table?
✓ Groups are the vertical columns in the periodic table. Each group consist of elements which have same number of electrons in the valence shell.
→ What are periods in a periodic table?
✓ Periods are the horizontal rows in the periodic table. Each period consists of elements which have same number of orbits of the electrons.
- The metallic nature of elements decrease from left - right across period.
- The metallic nature of elements increase from top - bottom across groups.
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