Question 1

Which of the following polyatomic ions has a positive charge?

Accepted Answer

Ammonium ($$NH_4$$^+$$)

Question 2

What is the correct formula for the sulfate ion?

Accepted Answer

$$SO_4$$^{2-}$$

Question 3

Which element forms two or more ions with different ionic charges?

Accepted Answer

Iron (Fe)

Question 4

The visible light spectrum covers which wavelength range?

Accepted Answer

400 to 700 nm

Question 5

Which of the following is a halogen?

Accepted Answer

Chlorine

Question 6

What is the correct electron configuration for the lithium atom?

Accepted Answer

$$1s^2$$ $$2s^1$$

Question 7

Which polyatomic ion is found in sodium hypochlorite (NaClO)?

Accepted Answer

Hypochlorite ($$ClO^-)$$

Question 8

According to the atomic theory, atoms are neither created nor destroyed during a chemical reaction. Which law does this statement illustrate?

Accepted Answer

Law of Conservation of Mass

Question 9

Which compound contains both a metal and a polyatomic ion?

Accepted Answer

Mg(OH)$$_2$$

Question 10

What is the correct formula for copper(II) phosphate?

Accepted Answer

$$Cu_3$$($$PO_4)_2$

Question 11

Which element is a noble gas?

Accepted Answer

Helium

Question 12

Which polyatomic ion is present in potassium nitrate?

Accepted Answer

Nitrate ($$NO_3$$^-$$)

Question 13

Which of the following ions is found in sodium carbonate?

Accepted Answer

Carbonate ($$CO_3$$^{2-}$$)

Question 14

Which element is in Period 4 and Group 2 of the periodic table?

Accepted Answer

Calcium (Ca)

Question 15

Which of the following ions is found in ammonium sulfate?

Accepted Answer

Ammonium ($$NH_4$$^+$$)

Question 16

Which of the following electromagnetic radiations has the highest energy?

Accepted Answer

Gamma ray

Question 17

Which polyatomic ion is present in sodium perchlorate?

Accepted Answer

Perchlorate ($$ClO_4$$^-$$)

Question 18

Which of the following is the correct abbreviated electron configuration for vanadium?

Accepted Answer

$$[Ar] 4s^2$ 3d^3$

Question 19

Which of the following ions is found in potassium cyanide?

Accepted Answer

Cyanide ($$CN^-)$$

Question 20

Which of the following compounds is classified as an alkali metal salt?

Accepted Answer

NaCl

Intro to Chemistry Study Guide: Atomic Structure, Electron Configuration, Polyatomic Ions, and Chemical Nomenclature

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