Answer:
4 and 6
Explanation:
Period 4 has 18 elements and so does period 6.
Answer:
- <u>Purpose of Iodine:</u>
Iodine plays a vital role in thyroid health. Our thyroid gland, which is located at the base of the front of your neck, helps regulate hormone production. These hormones control your metabolism and heart health.
The symbol of Iodine is " I ".
Atomic mass of Iodine is 126.90447 u
No. of protons in Iodine is 53.
No. of neutrons in Iodine is 74.
No. of electrons in Iodine is 53.
Alkali metals
Hydrogen only needs one more valence electron to fill it's out shell. So it belongs with the alkali metals.
C because we need materials in the lab