complete the sentences. a hydrogen atom has. it needs to fill its outermost electron shell. an oxygen atom…

complete the sentences. a hydrogen atom has. it needs to fill its outermost electron shell. an oxygen atom has. it needs to fill its outermost electron shell.

complete the sentences. a hydrogen atom has. it needs to fill its outermost electron shell. an oxygen atom has. it needs to fill its outermost electron shell.

Answer

Explanation:

Step1: Analyze hydrogen atom

Hydrogen has 1 electron. Its out - most shell can hold 2 electrons. So it needs 1 more electron to fill its outermost shell.

Step2: Analyze oxygen atom

Oxygen has 6 electrons in its outermost shell. Its outermost shell can hold 8 electrons. So it needs 2 more electrons to fill its outermost shell.

Answer:

A hydrogen atom has 1 electron. It needs 1 electron to fill its outermost electron shell. An oxygen atom has 6 outer - most electrons. It needs 2 electrons to fill its outermost electron shell.