Ion X has a charge of 2+, and ion Y has a charge of 1−. What is the formula unit of the compound formed from the ions?
Writing Formulas

Quiz
•
Chemistry
•
10th Grade
•
Hard
Sarah Mohamed
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
XY2
X2Y
XY
X2Y3
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What is the ionic ratio of aluminum to oxygen in the ionic compound aluminum oxide (Al2O3)?
one to three
three to one
two to three
one to two
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
The anion that has the formula ClO− is called the
chlorate ion
hypochlorite ion
chloride ion
chlorite ion
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What is the formula of calcium phosphate, which is made up of the ions Ca2+ and PO43−?
Ca6PO4
Ca3PO4
Ca3(PO4)2
Ca2(PO4)3
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following statements is true about the ammonium ion (NH4+) and the phosphate ion (PO43−)?
ammonium: monatomic anion; phosphate: monatomic cation
ammonium: polyatomic cation; phosphate: polyatomic anion
ammonium: monatomic cation; phosphate: monatomic anion
ammonium: polyatomic anion; phosphate: polyatomic cation
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following gives an incorrect formula? (BONUS QUESTION)
iron(II) sulfite; FeSO3
aluminum phosphate; AlPO4
magnesium hydroxide; Mg(OH)2
silver carbonate; AgCO3
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