Question

G. Give reasons for the following
1 Water is considered a compound
2 A molecule of oxygen is a diatomic molecule
3. Aluminium is considered a metal​

Answer 1

Answer:

Here are the reasons:

1. Water is a compound because it contains more than one element: hydrogen and oxygen atoms are joined together; as illustrated in the video clip Elements and Compounds, above. An important feature of compounds is that they are very different from the elements from which they are made.

2. Oxygen generally exists as a diatomic molecule in the atmosphere when it is not combined with any other element. It forms the molecule O2 because in that configuration, it has its lowest energy level when uncombined. In the standard model of the oxygen molecule, each oxygen atom shares two pairs of electrons.

3. Aluminium is ordinarily classified as a metal. It is lustrous, malleable and ductile, and has high electrical and thermal conductivity. Like most metals it has a close-packed crystalline structure, and forms a cation in aqueous solution.

Explanation:

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Answer 2

$\boxed {⛥Answer⛥}$

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$\sf {\underline {\pink {\mathtt {❃Water\: is\: considered\: as\: a\: compound❃ }}}}$

$\boxed {「Reason」}$

➻ ᴄᴏᴍᴘᴏᴜɴᴅ ғᴏʀᴍs ᴡʜᴇɴᴇᴠᴇʀ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ ᴀᴛᴏᴍs ᴀᴛᴏᴍs ғᴏʀᴍ ᴄʜᴇᴍɪᴄᴀʟ ʙᴏɴᴅs ᴡɪᴛʜ ᴇᴀᴄʜ ᴏᴛʜᴇʀ. ᴛʜᴇ ᴄʜᴇᴍɪᴄᴀʟ ғᴏʀᴍᴜʟᴀ ғᴏʀ ᴡᴀᴛᴇʀ ɪs ʜ2ᴏ ᴡʜɪᴄʜ ᴍᴇᴀɴs ᴇᴀᴄʜ ᴍᴏʟᴇᴄᴜʟᴇ ᴏғ ᴡᴀᴛᴇʀ ᴄᴏɴsɪsᴛs ᴏғ ᴏɴᴇ ᴏxʏɢᴇɴ ᴀᴛᴏᴍ ᴄʜᴇᴍɪᴄᴀʟʟʏ ʙᴏɴᴅᴇᴅ ᴛᴏ ᴛᴡᴏ ʜʏᴅʀᴏɢᴇɴ ᴀᴛᴏᴍs.ᴛʜᴜs,ᴡᴀᴛᴇʀ ɪs ᴀ ᴄᴏᴍᴘᴏᴜɴᴅ.

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$\sf {\underline {\orange {\mathtt {❃A\: molecule\: of\: oxygen\: is\: a\: diatomic}}}}$

$\sf {\underline {\orange {\mathtt { molecule❃ }}}}$

$\boxed {「Reason」}$

➻ ᴅɪᴀᴛᴏᴍɪᴄ ᴍᴏʟᴇᴄᴜʟᴇs ᴀʀᴇ ᴍᴏʟᴇᴄᴜʟᴇs ᴄᴏᴍᴘᴏsᴇᴅ ᴏғ ᴏɴʟʏ ᴛᴡᴏ ᴀᴛᴏᴍs, ᴏғ ᴛʜᴇ sᴀᴍᴇ ᴏʀ ᴅɪғғᴇʀᴇɴᴛ ᴄʜᴇᴍɪᴄᴀʟ ᴇʟᴇᴍᴇɴᴛs. ᴛʜᴇ ᴘʀᴇғɪx ᴅɪ- ɪs ᴏғ ɢʀᴇᴇᴋ ᴏʀɪɢɪɴ, ᴍᴇᴀɴɪɴɢ "ᴛᴡᴏ".ɪғ ᴛʜᴇ ᴛᴡᴏ ᴀᴛᴏᴍs ᴀʀᴇ ɪᴅᴇɴᴛɪᴄᴀʟ, ᴛʜᴇʏ ᴄᴏᴍᴘᴏsᴇ ᴀ ʜᴏᴍᴏɴᴜᴄʟᴇᴀʀ ᴅɪᴀᴛᴏᴍɪᴄ ᴍᴏʟᴇᴄᴜʟᴇ.

➻ ᴛʜᴜs,ᴍᴏʟᴇᴄᴜʟᴀʀ ᴏxʏɢᴇɴ (ᴏ2) ɪs ᴀ ᴅɪᴀᴛᴏᴍɪᴄ ᴍᴏʟᴇᴄᴜʟᴇ ᴛʜᴀᴛ ɪs ᴄᴏᴍᴘᴏsᴇᴅ ᴏғ ᴛᴡᴏ ᴏxʏɢᴇɴ ᴀᴛᴏᴍs ʜᴇʟᴅ ᴛᴏɢᴇᴛʜᴇʀ ʙʏ ᴀ ᴄᴏᴠᴀʟᴇɴᴛ ʙᴏɴᴅ.

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$\sf {\underline {\red {\mathtt {❃Aluminium\: is\: considered\: as\: a\: metal❃ }}}}$

$\boxed {「Reason」}$

➻ ᴀʟᴜᴍɪɴᴜᴍ (ᴀʟ), ᴀʟsᴏ sᴘᴇʟʟᴇᴅ ᴀʟᴜᴍɪɴɪᴜᴍ, ᴄʜᴇᴍɪᴄᴀʟ ᴇʟᴇᴍᴇɴᴛ, ᴀ ʟɪɢʜᴛᴡᴇɪɢʜᴛ, sɪʟᴠᴇʀʏ-ᴡʜɪᴛᴇ ᴍᴇᴛᴀʟ ᴏғ ᴍᴀɪɴ ɢʀᴏᴜᴘ 13 (ɪɪɪᴀ, ᴏʀ ʙᴏʀᴏɴ ɢʀᴏᴜᴘ) ᴏғ ᴛʜᴇ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ. ᴀʟᴜᴍɪɴᴜᴍ ɪs ᴛʜᴇ ᴍᴏsᴛ ᴀʙᴜɴᴅᴀɴᴛ ᴍᴇᴛᴀʟʟɪᴄ ᴇʟᴇᴍᴇɴᴛ ɪɴ ᴇᴀʀᴛʜ's ᴄʀᴜsᴛ ᴀɴᴅ ᴛʜᴇ ᴍᴏsᴛ ᴡɪᴅᴇʟʏ ᴜsᴇᴅ ɴᴏɴғᴇʀʀᴏᴜs ᴍᴇᴛᴀʟ.

➻ ɪᴛ ɪs ᴏʀᴅɪɴᴀʀɪʟʏ ᴄʟᴀssɪғɪᴇᴅ ᴀs ᴀ ᴍᴇᴛᴀʟ. ɪᴛ ɪs ʟᴜsᴛʀᴏᴜs, ᴍᴀʟʟᴇᴀʙʟᴇ ᴀɴᴅ ᴅᴜᴄᴛɪʟᴇ, ᴀɴᴅ ʜᴀs ʜɪɢʜ ᴇʟᴇᴄᴛʀɪᴄᴀʟ ᴀɴᴅ ᴛʜᴇʀᴍᴀʟ ᴄᴏɴᴅᴜᴄᴛɪᴠɪᴛʏ. ʟɪᴋᴇ ᴍᴏsᴛ ᴍᴇᴛᴀʟs ɪᴛ ʜᴀs ᴀ ᴄʟᴏsᴇ-ᴘᴀᴄᴋᴇᴅ ᴄʀʏsᴛᴀʟʟɪɴᴇ sᴛʀᴜᴄᴛᴜʀᴇ, ᴀɴᴅ ғᴏʀᴍs ᴀ ᴄᴀᴛɪᴏɴ ɪɴ ᴀǫᴜᴇᴏᴜs sᴏʟᴜᴛɪᴏɴ.

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Thank you ❣️