is " " are important on html

Question

I see the same result when I drop them !
like
<input type = "radio" name= "gender" value = "female"> female <br/>
<input type = radio name= gender value = female> female <br/>

Answer 1

not necessary when using a single word required when using a space character.

<input type=text name= 'just something' value="why not try this yourself?">something</input>

Answer 2

i think in html 5 it's not needed you can do without ' or "

Answer 3

yes.

Answer 4

you can also use ' ' instead " " but it is necessary