name= calcium
atomic mass= 40.078 atomic mass unit
no of protons= 20
no of electrons=20
Answer:
the atomic particles in the necluse are called ions which are positive and negive charged atoms
Explanation:
<span>Answer is: the symbol is Cl.
[Ne ] 3s</span>² 3p⁶ is electric configuration of noble gas argon, neon (Ne) has10 electrons plus 6 electrons in 3s and 3p orbitals. Neutral atom of m<span>onatomic ion that has a charge of 1– has one electron less than argon, so that atom (chlorine) has 17 electrons. Charge of 1- means one electron more for ion: 17 + 1 = 18.
</span>
Answer:
Explanation:
Hello there!
In this case, according to the given information it turns out possible for us to realize that one mole of the given compound, Mg(ClO₄)₂, has one mole of Mg, two moles of Cl and eight moles of O; thus, we proceed as follows:
Best regards!
"18) the element with the most stable nucleus and smallest mass per particle is:A) uranium.B)argon C) helium."