Perdioc Table

Question 1

What is the primary purpose of the periodic table?

Answer 1

To organize and classify chemical elements based on their properties.

Question 2

True or False: The periodic table is arranged in order of increasing atomic number.

Answer 2

True

Question 3

What do the columns in the periodic table represent?

Answer 3

Groups or families of elements with similar chemical properties.

Question 4

Fill in the blank: The horizontal rows in the periodic table are called __________.

Answer 4

Periods

Question 5

Which element has the atomic number 1?

Answer 5

Hydrogen

Question 6

What are the three main categories of elements in the periodic table?

Answer 6

Metals, nonmetals, and metalloids.

Question 7

What is the significance of the atomic mass listed on the periodic table?

Answer 7

It represents the average mass of an element’s isotopes.

Question 8

True or False: Noble gases are found in group 18 of the periodic table.

Answer 8

True

Question 9

Which element is represented by the symbol ‘Fe’?

Answer 9

Iron

Question 10

What is the name of the group that contains lithium, sodium, and potassium?

Answer 10

Alkali metals

Question 11

Fill in the blank: Elements in the same group typically have the same number of __________.

Answer 11

Valence electrons

Question 12

What is the main characteristic of transition metals?

Answer 12

They can form variable oxidation states and colored compounds.

Question 13

Which element is a liquid at room temperature?

Answer 13

Mercury

Question 14

True or False: The lanthanides and actinides are part of the main body of the periodic table.

Answer 14

False

Question 15

What is the term for elements that have similar chemical behavior and are in the same column?

Answer 15

Group

Question 16

Which element is known as the ‘building block of life’?

Answer 16

Carbon

Question 17

What is the atomic number of oxygen?

Answer 17

8

Question 18

Fill in the blank: The periodic table was first organized by __________.

Answer 18

Dmitri Mendeleev

Question 19

What distinguishes metalloids from metals and nonmetals?

Answer 19

They have properties of both metals and nonmetals.

Question 20

True or False: All elements in the periodic table are stable.

Answer 20

False

Question 21

What is the name given to the vertical columns in the periodic table?

Answer 21

Groups

Question 22

Which group contains elements that are highly reactive and are known as halogens?

Answer 22

Group 17

Question 23

What is the electron configuration of a neutral atom of sodium (Na)?

Answer 23

1s² 2s² 2p⁶ 3s¹

Question 24

Fill in the blank: The periodic table is divided into __________ and __________ sections.

Answer 24

Main group elements, transition metals

Question 25

What are the properties of alkali metals?

Answer 25

They are soft, highly reactive, and have one valence electron.

Question 26

True or False: The atomic radius generally decreases across a period.

Answer 26

True

Question 27

Which element is the most electronegative?

Answer 27

Fluorine

Question 28

What is the primary characteristic of noble gases?

Answer 28

They are inert and do not readily form compounds.

Question 29

What does the term 'ionization energy' refer to?

Answer 29

The energy required to remove an electron from an atom.

Question 30

Fill in the blank: The element with atomic number 26 is __________.

Answer 30

Iron

Question 31

What is the name of the two rows of elements placed below the main body of the periodic table?

Answer 31

Lanthanides and actinides

Question 32

True or False: All metals are solid at room temperature.

Answer 32

False

Question 33

Which group contains the least reactive elements?

Answer 33

Noble gases

Question 34

What is the main difference between isotopes of an element?

Answer 34

They have different numbers of neutrons.

Question 35

What is the relationship between atomic number and the number of protons in an atom?

Answer 35

They are the same; the atomic number is equal to the number of protons.

Question 36

Fill in the blank: The periodic table is a tool used in __________ to predict the behavior of elements.

Answer 36

Chemistry