Question

question 4
1 pts
na+ represents a
sodium ion
potassium ion
sodium atom
potassium atom
naval ion
question 5
1 pts
titanium(iv) oxide has the formula
ti4o
tio2
ti4o2
ti(iv)o
tio4
question 6
1 pts
which of the following is the correct formula for sulfur trioxide?
so3
so
s2o3
s3o2
s3o

Explanation:

• For Question 4: The symbol 'Na' is the chemical symbol for sodium. A '+' charge indicates it has lost an electron, making it an ion. So, \( \text{Na}^+ \) is a sodium ion.
• For Question 5: In Titanium(IV) oxide, the Roman numeral (IV) means titanium has a +4 charge. Oxygen has a -2 charge. Using the criss - cross method (charges become sub - scripts), we get \( \text{TiO}_2 \).
• For Question 6: The prefix 'tri -' in sulfur trioxide means there are three oxygen atoms. Sulfur is 'S' and oxygen is 'O', so the formula is \( \text{SO}_3 \).

Answer:

Question 4: sodium ion
Question 5: \( \text{TiO}_2 \)
Question 6: \( \text{SO}_3 \)