Answer:
H-F> H-O> O-F
while H-H is nonpolar.
Explanation:
The bond is polar when electronegativity difference of both bonded atom is greater than 0.4.
Electronegativity values of O. F and H are
O = 3.4
H = 2.2
F = 3.98
For O-F
3.98 - 3.4 = 0.58
For H-F
3.98 - 2.2 = 1.78
For H-O
3.4 - 2.2 = 1.2
For H-H
2.2 -2.2 = 0
So H-H is nonpolar.
You need to be able to draw dot-and-cross diagrams to show the ions in some common ionic compounds.
<h2><em>1. A</em></h2><h2><em>3. B</em></h2><h2><em>4. C</em></h2><h2><em>7. E</em></h2><h2><em>5. F</em></h2>
Answer:
Melting is a physical change with no change in temperature of the substance while when the object is set on fire, its temperature changes.
Explanation:
Melting cause physical change in any substance. The temperature of the substance remain same but the physical property changes i.e in melting substance changes its state from solid to liquid.
However, in case of setting a substance on fire the temperature changes along with the state of the substance.
