the alkali metals are a group of oxidation metals that decrease in melting point down the group. Halogens are non-metals that get coloured in colour and less reactive down the group. the transition elements in the middle of the periodic table. hey are metals with very high melting points and densities. they form soft compounds in which they have a variety of darker states.

can you please check if this is right

That looks ok but you need to clean up the King's English a little if you're turning this in for credit.

i dint get that????????????

A couple of examples follow:

"Halogens are non-metals that get coloured in colour and less reactive down the group." I would have stated it a little differently, something like this.
"Halogens are non-metals that become coloured and less reactive as one moves down the group." and

the transition elements in the middle of the periodic table. hey are metals with very high melting points and densities. they form soft compounds in which they have a variety of darker states.
the needs to start with a capital letter. You end the sentence with a period at table but that isn't a complete sentence. Then you pick it up with they (mispelled) which makes a sentence that is not good grammar; i.e., "the transition metals in the middle of the table, they are metals...." Then the next sentence starts with a lower case letter (they), etc. I'm not a good grammarian but we need to try to do better.

Yes, your statements are mostly correct. Let's break them down and verify each one:

1. The alkali metals are a group of oxidation metals that decrease in melting point down the group.
Yes, this is correct. The alkali metals, which include elements like lithium, sodium, and potassium, are indeed a group of highly reactive metals. As you move down the group, the melting points decrease, meaning that the elements at the bottom of the group have lower melting points compared to those at the top.

2. Halogens are non-metals that get coloured in colour and less reactive down the group.
Here, it seems like you might have made a small error. Halogens are indeed non-metals that belong to Group 17 of the periodic table. They become less reactive down the group, but they don't necessarily "get coloured in colour." However, some halogens do exhibit distinct colors in certain states. For example, chlorine gas is yellow-green, while bromine liquid is reddish-brown.

3. The transition elements in the middle of the periodic table. They are metals with very high melting points and densities. They form soft compounds in which they have a variety of darker states.
This statement has a couple of inaccuracies. Firstly, while it's true that the transition elements are located in the middle of the periodic table, they are not necessarily only in the middle. They span across several periods as well. Secondly, the transition elements, which include elements such as iron, copper, and gold, are indeed metals, but their melting points and densities can vary. Some have high melting points and are heavy, but others may have lower melting points and lower densities. Lastly, the term "soft compounds" is not commonly associated with transition elements. They typically form compounds with a wide range of properties, including various colors, but not necessarily "darker states."

Overall, your statements are mostly correct, but there are a few minor inaccuracies.