Question 1

Which of the following statements best describes an element?

Accepted Answer

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Question 2

Which of the following is the correct chemical symbol for iron?

Accepted Answer

Fe

Question 3

A student is given a sample of a shiny, silvery metal that is liquid at room temperature and is known to be toxic if inhaled as vapor. Which element is this most likely to be?

Accepted Answer

Mercury ($$Hg)$$

Question 4

Which of the following elements is a halogen?

Accepted Answer

Chlorine ($$Cl)$$

Question 5

Which group on the Periodic Table contains the noble gases?

Accepted Answer

Group 18

Question 6

Which of the following is a property of alkali metals (Group 1)?

Accepted Answer

They are soft, shiny metals that react vigorously with water.

Question 7

Which of the following elements is a metalloid?

Accepted Answer

Silicon ($$Si)$$

Question 8

A patient is found to have a deficiency in the element with the symbol $$Mg. $$Which essential element is this?

Accepted Answer

Magnesium

Question 9

Which of the following statements about periods on the Periodic Table is correct?

Accepted Answer

Each horizontal row is called a period and is counted from top to bottom.

Question 10

Which of the following is the correct chemical symbol for iodine?

Accepted Answer

I

Question 11

Which of the following best describes the difference between metals, nonmetals, and metalloids?

Accepted Answer

Metals are good conductors of heat and electricity, nonmetals are poor conductors, and metalloids have properties intermediate between metals and nonmetals.

Question 12

Which of the following elements is most likely to be found in Group 2 (alkaline earth metals)?

Accepted Answer

Magnesium ($$Mg)$$

Question 13

A compound is formed from two different elements. Which of the following is a correct way to write the chemical symbols for this compound?

Accepted Answer

$$NaCl$$

Question 14

Which of the following elements is a transition metal?

Accepted Answer

Iron ($$Fe)$$

Question 15

Which of the following is the correct chemical symbol for zinc?

Accepted Answer

Zn

Question 16

A scientist is studying an element that is shiny, conducts electricity, but is less reactive than alkali metals. This element is most likely found in which group?

Accepted Answer

Group 2 (alkaline earth metals)

Question 17

Which of the following elements is a nonmetal essential for human health and is represented by the symbol $$O$$?

Accepted Answer

Oxygen

Question 18

Which of the following is true about the arrangement of the Periodic Table?

Accepted Answer

Elements are arranged in order of increasing atomic number.

Question 19

Which of the following is the correct chemical symbol for lithium?

Accepted Answer

Li

Question 20

A patient is exposed to a toxic element that can enter the body through inhalation, skin contact, or ingestion of contaminated food and water. This element is liquid at room temperature. Which element is this?

Accepted Answer

Mercury ($$Hg)$$

Elements and the Periodic Table: Structure, Classification, and Chemical Symbols

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