First calculate for number of moles:
moles Ag = 12 g / (107.87 g / mol)
moles Ag = 0.111 mol
Convert to atoms using Avogadros number:
atoms Ag = 0.111 mol * (6.022 x 10^23 atoms / mol)
atoms Ag = 6.7 x 10^22 atoms
There are 47 electrons per atom, therefore:
Number of electrons = (6.7 x 10^22 atoms) * (47 electrons
/ atom)
<span>Number of electrons = 3.15 x 10^24 electrons</span>
Answer:
Electronegativity increases across the period on a periodic table.
Explanation:
Electronegativity is the ability of an atom to attract electron to itself.
All elements on the periodic table combines in order to have a complete octet i.e they all want to be like the noble gases, group 0 elements.
This is what drives most atom to combine chemically. By so doing, they either lose or gain electrons.
Cl belongs to the 7th group on the periodic table. It is the second element in this halogen group. Most halogens are notable for their high electronegativity. They have 7 electrons in their outermost shell and would require just an electron to complete their octet.
This makes them highly reactive and combine readily with other elements.
The halogens have a strong attraction for valence electrons. The higher the electronegativity value, the stronger the attraction an atom has for valence electrons.
Most metals like Al and Na are electropositive and readily donates or lose electrons so as to have a complete octet.
Answer:
I believe it's A. to reduce air bubbles. Tbh, it's been a while
If your equation is <span>Cu+NO^- 3-->Cu^2+NO, then the answer is
</span><span>2 Cu + 1 NO3{-} → 1 Cu^{2+} + 3 NO
</span>
To check if it is balance, this is the solution:
2- Cu- 2
3- N -3
3- O -3
