B. francium and platinum
C. rubidium and zinc
D. barium and mercury
Answer:
use the rule of speed
Explanation:
speed =distance over time
Roasting marshmallows
Cutting paper
Baking cookies
1)Cu
2)PO4-3
3)SO2
Answer:
Explanation: the answer is B. PO4-3
Both CH4 and CH3Cl have tetrahedral shapes, the presence of a more electronegative atom (chlorine) in CH3Cl leads to an uneven distribution of electron density and gives it a polar nature, whereas CH4 remains nonpolar due to the symmetric distribution of electron density among the identical hydrogen atoms.
The polarity of a molecule is determined by the presence of polar bonds and the molecular geometry of the molecule.
In both CH4 (methane) and CH3Cl (chloromethane), the central carbon atom is surrounded by four other atoms, which gives them a tetrahedral shape.
In CH4, all four surrounding atoms are hydrogen (H) atoms. Hydrogen and carbon have similar electronegativity values, meaning the shared electrons in the carbon-hydrogen bonds are equally attracted to both atoms.
This results in a nonpolar molecule since the electron distribution is symmetrical around the central carbon atom.
In CH3Cl, one of the hydrogen atoms in CH4 is replaced by a chlorine (Cl) atom. Chlorine is more electronegative than carbon, creating an unequal sharing of electrons in the carbon-chlorine bond.
The chlorine atom attracts the shared electrons more strongly, creating a partial negative charge (δ-) on the chlorine and a partial positive charge (δ+) on the carbon.
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