The Periodic Table

Question 1

What is the periodic table?

Answer 1

A tabular arrangement of chemical elements organized by their atomic number, electron configuration, and recurring chemical properties.

Question 2

Who is credited with creating the first periodic table?

Answer 2

Dmitri Mendeleev.

Question 3

What determines the position of an element in the periodic table?

Answer 3

The atomic number.

Question 4

True or False: The periodic table is arranged in rows called periods and columns called groups.

Answer 4

True.

Question 5

What are the vertical columns in the periodic table called?

Answer 5

Groups or families.

Question 6

What are the horizontal rows in the periodic table called?

Answer 6

Periods.

Question 7

Fill in the blank: Elements in the same group have similar _______.

Answer 7

Chemical properties.

Question 8

What is the atomic number of carbon?

Answer 8

6.

Question 9

Which element has the highest atomic number currently known?

Answer 9

Oganesson (Og), atomic number 118.

Question 10

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

Answer 10

False.

Question 11

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

Answer 11

Metals, nonmetals, and metalloids.

Question 12

Which group contains the noble gases?

Answer 12

Group 18.

Question 13

What is the most abundant element in the universe?

Answer 13

Hydrogen.

Question 14

What is a lanthanide?

Answer 14

A series of 15 elements from lanthanum (La) to lutetium (Lu) in the periodic table.

Question 15

Fill in the blank: The elements in group 1 are known as _______ metals.

Answer 15

Alkali.

Question 16

What is the primary characteristic of transition metals?

Answer 16

They can form variable oxidation states and often have colored compounds.

Question 17

Which element is represented by the symbol ‘Fe’?

Answer 17

Iron.

Question 18

True or False: The periodic table is static and does not change over time.

Answer 18

False.

Question 19

What is the significance of the ‘stair-step’ line on the periodic table?

Answer 19

It separates metals from nonmetals and indicates the position of metalloids.

Question 20

What is the main characteristic of alkali metals?

Answer 20

They are highly reactive and have one electron in their outermost shell.

Question 21

Which element has the chemical symbol ‘Na’?

Answer 21

Sodium.

Question 22

What do we call the elements that are found in group 17?

Answer 22

Halogens.

Question 23

What property increases from left to right across a period?

Answer 23

Electronegativity.

Question 24

Fill in the blank: The atomic mass of an element is the weighted average of the masses of its _______.

Answer 24

Isotopes.

Question 25

What is the most reactive group of nonmetals?

Answer 25

Halogens.

Question 26

Which element is a liquid at room temperature?

Answer 26

Bromine (Br).

Question 27

True or False: All noble gases are colorless and odorless.

Answer 27

True.

Question 28

What is the primary use of helium?

Answer 28

Filling balloons and as a cooling medium in MRI machines.

Question 29

What does the term 'ionic radius' refer to?

Answer 29

The measure of an atom's ion in a crystal lattice.

Question 30

Which group contains the most stable elements?

Answer 30

Noble gases.

Question 31

What is the general trend of atomic radius across a period?

Answer 31

It decreases from left to right.

Question 32

What is the chemical symbol for gold?

Answer 32

Au.

Question 33

Fill in the blank: The elements in group 2 are known as _______ earth metals.

Answer 33

Alkaline.

Question 34

What is the significance of the periodic law?

Answer 34

It states that the properties of elements are a periodic function of their atomic numbers.

Question 35

What is the common oxidation state of alkali metals?

Answer 35

+1.

Question 36

Which element is known as the 'building block of life'?

Answer 36

Carbon.

Question 37

What is the primary characteristic of metalloids?

Answer 37

They have properties of both metals and nonmetals.

Question 38

Which element has the atomic number 1?

Answer 38

Hydrogen.

Question 39

What is the trend in reactivity for alkali metals as you move down the group?

Answer 39

Reactivity increases.

Question 40

True or False: The periodic table can predict the properties of elements.

Answer 40

True.

Question 41

What are synthetic elements?

Answer 41

Elements that are not found naturally and are created in laboratories.

Question 42

What is the main use of transition metals?

Answer 42

They are commonly used in construction and manufacturing due to their strength and conductivity.

Question 43

Which element is represented by the symbol 'Hg'?

Answer 43

Mercury.

Question 44

What is the definition of electronegativity?

Answer 44

The tendency of an atom to attract electrons in a chemical bond.

Question 45

Which group of elements is known for having a full outer electron shell?

Answer 45

Noble gases.

Question 46

Fill in the blank: The halogens are highly _______ and can form salts.

Answer 46

Reactive.

Question 47

What is a characteristic of actinides?

Answer 47

They are all radioactive and include elements like uranium and plutonium.

Question 48

Which element is a noble gas with an atomic number of 10?

Answer 48

Neon.

Question 49

What is the significance of isotopes in chemistry?

Answer 49

Isotopes are variants of elements that have the same number of protons but different numbers of neutrons.

Question 50

True or False: The periodic table includes only naturally occurring elements.

Answer 50

False.

Question 51

What is the primary characteristic of nonmetals?

Answer 51

They are poor conductors of heat and electricity.