H-Cl pair of atoms has the most polar bond.
Answer:
1. How many electrons does hydrogen need in order to have a full shell of valence electrons?...two
2. How do valence electrons impact the type of bonds an atom makes?...An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
3.Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)...O=C=O
4. Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?...No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
5. In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?...H-O-O-H
Explanation:
Balanced equation:
Al2(SO4)3 +3 Ca(OH)2 ---> 2Al(OH)3 + 3CaSO4?
Check:
Left side: Al:2; [SO4]: 3; Ca: 3; [OH] 3*2 = 6
Rigth side: Al: 2; [OH]: 2*3 = 6; Ca:3; [SO4]: 3
Mole ratio of Ca(OH)2 : Al (OH)3
3 moles of Ca(OH)2: 2moles of Al(OH)3 = 3:2
Answer: Option B.
This is much more simple than it sounds...
s has 1 orbital; p = 3 orbitals; d= 5 orbitals; f= 7 orbitals. (you just need to memorize this)
A maximum of 2 electrons can occupy each orbital.
<span>The number of orbitals that each atom has is based on the number of electrons it has and by consequence it's position on the periodic table. </span>
The orbitals occur in sequence. Whereby electrons fill first from the lowest energy level (1s) outwards to the highest.
3p = the following sequence.
1s, 2s, 2p, 3s, 3p: these 'sets' can hold the following electrons respectively (2+2+6+2+6) 18 which corresponds with argon on the periodic table. REMEMBER p has 3 orbitals, d has 5 orbitals. So, here there are 9 orbitals.
The sequence through n=4 is:
<span>1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, 4f
</span>
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