We can use

first-child

to select only the first child element:

.my-list li:first-child {
    background-color: red;
}

last-child

is used to select the last member from the list:

my-list li:last-child {
    background-color: blue;
}

nth-child(5)

is used to select

nth

element. In the example we select 5th element

.my-list li:nth-child(5) {
    background-color: yellow;
}

We can also use

nth-child(even)

to select even members from the list

.my-list li:nth-child(even) {
    background-color: grey;
}