Answer:

Two unpaired electrons

Explanation:

The elements of group 16 include; oxygen, sulphur, selenium, tellurium etc. These elements contain six electrons on their outermost shells. These six electrons are comprised of two lone pairs and two unpaired electrons. The outermost electron configuration of group 16 elements is ns2np4.

Let us take a well known example, look at the formation of water. Oxygen contains two lone pairs of electrons and two unpaired electrons which are used to bond to two hydrogen atoms to form H2O. Similar hydrides are formed with other group 16 elements.

Hmm the answer is 2.454

No explanation needed it’s just 2.454

**Answer:**

<h3>The answer is 1.53 moles</h3>

**Explanation:**

To find the number of moles in a substance given it's number of entities we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

We have the final answer as

<h3>1.53 moles </h3>

Hope this helps you

For example, Na2SO4 has two sodium (Na) atoms with an oxidation charge of plus 1 each and an overall oxidation value of plus 2.

Please tell me if this helped

You multiply 6.50 by the molar mass of H2SO4.