Complete each equation with a number that is true.5 * _ =15
2 answers:
You might be interested in
Emerald can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as .
What is the significant of Emerald ?</h3>
Through time, the emerald has been known as a symbol of truth and love.
In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.
On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.
Learn more about Gem stones here ;
brainly.com/question/14375301
#SPJ1
Answer:
7 valence electrons
Explanation:
Astatine has the atomic number 85. Thus, its electron configuration is:
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵
As we can see, in the last level (6) it has 2 + 5 = 7 electrons, that is, astatine has 7 electrons in its valence shell. In the Lewis dot structure (attached) we write 3 pairs of electrons and 1 unpaired electron around the symbol of At.
