Question 1

Which of the following elements is a metalloid commonly found in the body and is essential for bone health?

Accepted Answer

Silicon

Question 2

A neutral atom of potassium ($$K) $$has an atomic number of 19 and a mass number of 39. How many neutrons does it have?

Accepted Answer

$$20$$

Question 3

Which element has the highest ionization energy among the following?

Accepted Answer

Fluorine ($$F)$$

Question 4

Which of the following statements correctly describes an electron?

Accepted Answer

Is found outside the nucleus

Question 5

Select the element that is a halogen and is found in Period 5 of the periodic table.

Accepted Answer

Iodine ($$I)$$

Question 6

Which of the following elements is a noble gas located in Period 4?

Accepted Answer

Krypton ($$Kr)$$

Question 7

A patient is diagnosed with a deficiency in the element with atomic number 30. What is the name and symbol of this element?

Accepted Answer

Zinc, Zn

Question 8

Which of the following elements is classified as a nonmetal and is a gas at room temperature?

Accepted Answer

Nitrogen

Question 9

Which element has the largest atomic size among the following?

Accepted Answer

Rubidium ($$Rb)$$

Question 10

Which of the following elements has the smallest atomic radius?

Accepted Answer

Silicon ($$Si)$$

Question 11

A neutral atom of argon ($$Ar) $$has 18 protons. How many electrons does it have?

Accepted Answer

$$18$$

Question 12

Which of the following elements is a transition metal and is essential for oxygen transport in the blood?

Accepted Answer

Iron ($$Fe)$$

Question 13

Which element is located in Group 1A (1), Period 3 of the periodic table?

Accepted Answer

Sodium ($$Na)$$

Question 14

Which of the following elements is a metalloid and is used in the manufacture of computer chips?

Accepted Answer

Silicon ($$Si)$$

Question 15

Which element is found in Group 2A (2), Period 4 and is essential for muscle contraction?

Accepted Answer

Strontium ($$Sr)$$

Question 16

Which of the following elements is a halogen and is essential for thyroid hormone production?

Accepted Answer

Iodine ($$I)$$

Question 17

Which of the following elements is a noble gas and is used in lighting and signs?

Accepted Answer

Neon ($$Ne)$$

Question 18

Which element is found in Group 7A (17), Period 2 and is commonly used in toothpaste?

Accepted Answer

Fluorine ($$F)$$

Question 19

Which of the following elements is a metal and is liquid at room temperature?

Accepted Answer

Mercury ($$Hg)$$

Question 20

Which of the following elements is a nonmetal and is essential for protein synthesis in the body?

Accepted Answer

Sulfur ($$S)$$

Elements, Atomic Structure, and Periodic Trends: GOB Chemistry Study Notes

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