Question 1

Which of the following correctly matches the element with its chemical symbol?

Accepted Answer

Iron: Fe

Question 2

A patient is diagnosed with iron-deficiency anemia. Which ion is most likely to be low in their blood?

Accepted Answer

$$\mathrm{Fe$$^{2+}$$}$$

Question 3

Which of the following ions is a polyatomic ion with a 2- charge?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 4

A compound contains the ions $$\mathrm{Ca$$^{2+}$$}$$ and $$\mathrm{CO_3$^{2-}}. $$What is the correct chemical formula for this compound?

Accepted Answer

$$\mathrm{$$CaCO_3$$}$$

Question 5

Which of the following elements is a noble gas?

Accepted Answer

Neon

Question 6

Which of the following ions is most likely to be found in a solution of table salt dissolved in water?

Accepted Answer

$$\mathrm{Na^+}$$ and $$\mathrm{Cl^-}$$

Question 7

Which of the following correctly describes the charge and composition of the ammonium ion?

Accepted Answer

One nitrogen atom, four hydrogen atoms, 1+ charge

Question 8

A student is asked to write the formula for aluminum sulfate. Which is correct?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 9

Which of the following ions is isoelectronic with neon ($$\mathrm{Ne}$$)?

Accepted Answer

$$\mathrm{F^-}$$

Question 10

Which of the following best explains why sodium forms a $$\mathrm{Na^+}$$ ion?

Accepted Answer

Sodium loses one electron to achieve the electron configuration of neon.

Question 11

Which of the following is the correct formula for the compound formed between magnesium and nitrate ions?

Accepted Answer

$$\mathrm{Mg(NO_3$)_2}$$

Question 12

A solution contains $$\mathrm{NH_4$^+}$$ and $$\mathrm{Cl^-}. $$What is the name of the compound formed?

Accepted Answer

Ammonium chloride

Question 13

Which of the following ions is NOT correctly paired with its charge?

Accepted Answer

$$\mathrm{Cu$$^{2-}$$}$$: 2-

Question 14

Which of the following best describes the composition of the sulfate ion?

Accepted Answer

One sulfur atom and four oxygen atoms, 2- charge

Question 15

A chemist mixes a solution of silver nitrate with sodium chloride. A white precipitate forms. What is the formula of the precipitate?

Accepted Answer

$$\mathrm{AgCl}$$

Question 16

Which of the following is the correct name for $$\mathrm{K_2CrO_4}$$?

Accepted Answer

Potassium chromate

Question 17

Which of the following ions would combine with $$\mathrm{PO_4$^{3-}} to $$form a neutral compound with the formula $$\mathrm{$$AlPO_4$$}$$?

Accepted Answer

$$\mathrm{Al$$^{3+}$$}$$

Question 18

Which of the following is the correct formula for the compound formed between barium and hydroxide ions?

Accepted Answer

$$\mathrm{Ba(OH)_2}$$

Question 19

Which of the following best explains why chloride ions ($$\mathrm{Cl^-}) $$are commonly found in the human body?

Accepted Answer

Chlorine atoms gain one electron to achieve a stable octet, forming $$\mathrm{Cl^-}$$, which helps maintain osmotic balance in cells.

Question 20

A sample contains $$\mathrm{Cr_2O_7$$^{2-}$$}$$ ions. What is the correct name for this ion?

Accepted Answer

Dichromate

Essential Names and Ions in Introductory Chemistry

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