Answer:
Explanation:
1 : apple sliced : the apple was cut into smaller peices : physical change
2 : smashed apple : the apple became a mush : physical change
3 : paper burned : the paper became ash : chemical change
4 : glow stick snapped : the glow stick started glowing : chemical change
5 : apple being burned : the apple became discoloured and turned coal-like : chemical change
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2. it does not alter the chemical make up of the apple
3. because it changes to a new substance entirely, changing the chemical make up of the paper to make it something new
4. smashing the apple, because you mash up the apple with your teeth in your mouth
5. The apple being burned is being chemically broken down to form a new substance, the same way your stomach digests food to break down and use for other reasons.
Answer:
Halogens have 7 valence electrons.
Explanation:
They are the most active non-metals including fluorine, chlorine, bromine, iodine, and astatine
Answer:
a) 21 bonds , and 4 bonds
b) bond angles , a < 109.5° , b ≈ 120° c < 109.5° d,e < 120° f ≈ 120° g ≈ 109.5°
c) 6 carbon atom are sp² hybridized
d) two carbon atoms are sp³ hybridized,
two oxygen atoms are sp³ hybridized
Nitrogen is not sp³ hybridized , it has sp² hybridization
e) vitamin B6 exhibit delocalized bonding, because the three double bond in ring are delocalized over 5 carbon atoms and one nitrogen atom , they are formed due to 6 p orbitals of 5 carbons and 1 Nitrogen atom. The bonding in vitamin B6 is similar to the Benzene.
Explanation:
The answer is:
C. Fluorine is more reactive than nitrogen because fluorine needs only one electron to fill its outermost shell.