Answer:
atomic number 3
boiling point 1,342 °C (2,448 °F)
specific gravity 0.534 at 20 °C (68 °F)
oxidation state +1
electron configuration 2-1 or 1s22s1
Explanation:
i think this Is right 99% sure
Sodium/Atomic number
11
Gold/Atomic number
79
Potassium/Atomic number
19
Silicon/Atomic number
14
Answer:
C. It is reactive because it must gain two electrons to have a full outermost energy level.
Step-by-step explanation:
The electron configuration of this element ends in 2s²2p⁴.
A filled energy level would end in 2s²2p⁶.
The element will be reactive, because it must gain electrons to have a full energy level, and it needs two more electrons to do this.
Answer: iodine 131 iodine 132 isotopes
Explanation: