(Q1) State weather each of the following compounds is ionic or covalent: Q2) A: what is meant by a covalent bond? How does this bond hold two atoms together?

Q3) Draw dot-and-cross diagrams (showing outer shell electrons
Only) to show the covalent bonding in

Q4) Explain why carbon dioxide sublimes at -78.5°C but Diamond sublimes at around 4000°C.

Q5) Hexane has the formula C6H14, it is a liquid at room temperature.

Q6) Explain the following in terms of structure and bonding.

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72