Answer : Valence electrons in atom A = 1, B = 6 and C = 2.
Explanation :
Valence electrons means the outermost electrons are the ones which involved in bonding. Electrons are arranged in energy levels or shells.
Valence electrons are found in the highest energy orbitals of an element.
- The electronic configuration of (Na) is
. The highest energy orbital is 3s orbital which contains 1 electron. So,
The number of valence electrons in (Na) = A = 1
Similarly,
- The electronic configuration of (O) is
. The highest energy orbital are 2s and 2p orbitals which contains (2 + 4) = 6 electrons. So,
The number of valence electrons in (O) = B = 6
- The electronic configuration of (Fe) is
. The highest energy orbital is 4s orbital which contains 2 electrons. So,
The number of valence electrons in (Fe) = C = 2
Answer: first blank is heating second blank is pressure i think but i know that its NOT freezing
Explanation:
I did it and got it right
Ph 2 will ahve more strength due to the fact that its more acidic compared to pH 5.
the lower the number of a pH, the more it is heading towards being acidic, but the higher the number, the more it heads towards being an alkali. here is a ppt i made along time ago. hope it can help you . have a nice day
Answer:
This is the balanced equation:
Pb(NO₃)₂ (aq) + 2NaI (aq) → 2NaNO₃ (aq) + PbI₂ (s) ↓
Explanation:
This are the reactants:
PbNO₃
NaI
Iodide can react to Pb²⁺ to make a solid compound.
