Answer:
Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7
Explanation:
Number of electrons = 27
The closest noble gas before cobalt is Argon and argon has 18 electrons.
Co = [Ar] ; Remains 27 - 18 = 9 more electrons to fill.
The next orbital in order of increasing energy is the 4s orbital. However it can only hold a maximum of 2 electrons.
We have;
Co = [Ar] 4s2; Remains 27 - 20 = 7 more electrons to fill.
The next orbital in order of increasing energy is the 3d orbital. It can have a maximum of 10 electrons.
So we have;
Co = [Ar] 4s2 3d7
The electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6
This means the entire configuration of cobalt is;
Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7
The answer is d.) fission :)
Electrons orbit the nucleus like planets orbit the sun.
Answer:
1. Polar
2. Non-polar
3. Non-polar
4. Polar
5. Non-polar
6. Polar
Explanation:
Polar bonds are formed between molecules that share electrons unequally/unevenly. In a polar molecule, one atom is more electronegative than the other i.e it attracts/pulls more electrons than the other atom, hence, it ends up leaving the other atom with a positive charge i.e fewer electrons around its atom. Also, every molecule that has a symmetrical arrangement is NON-POLAR while the opposite is POLAR.
Based on this, the answers to the asked questions are in BOLD.
1. A POLAR bond is one where there are more shared electrons grouped around one atom than the other.
2. A NON-POLAR bond is one where the electrons are evenly distributed between the two atoms sharing electrons.
3. A molecule with symmetry is NON-POLAR
4. A molecule that does not have symmetry is POLAR.
5. A NON-POLAR molecule has its valence electrons evenly distributed around the molecule.
6. A POLAR molecule has one of its sides with more or fewer electrons than the other sides.
