history of the periodic table

Question 1

Who is credited with the creation of the first periodic table?

Answer 1

Dmitri Mendeleev

Question 2

True or False: Mendeleev’s periodic table was arranged by atomic number.

Answer 2

False

Question 3

What year was the first periodic table published?

Answer 3

1869

Question 4

Fill in the blank: The periodic table is organized by increasing __________.

Answer 4

atomic number

Question 5

Which scientist proposed a periodic law based on the properties of elements?

Answer 5

Dmitri Mendeleev

Question 6

What element did Mendeleev predict would be discovered after aluminum?

Answer 6

Gallium

Question 7

Multiple Choice: Which of the following elements was not known to Mendeleev when he created his periodic table? A) Hydrogen B) Gallium C) Argon D) Gold

Answer 7

C) Argon

Question 8

What did Mendeleev use to predict the properties of undiscovered elements?

Answer 8

The periodic trends and gaps in his table

Question 9

True or False: The periodic table has remained unchanged since its inception.

Answer 9

False

Question 10

Who arranged the periodic table according to atomic number instead of atomic mass?

Answer 10

Henry Moseley

Question 11

What is the significance of Moseley’s work on the periodic table?

Answer 11

It corrected the order of elements based on atomic number.

Question 12

Fill in the blank: The modern periodic table is arranged in __________ and periods.

Answer 12

groups

Question 13

What discovery in the early 20th century helped refine the periodic table?

Answer 13

The discovery of isotopes

Question 14

Multiple Choice: Which of the following elements was first isolated in 1895? A) Krypton B) Neon C) Argon D) Xenon

Answer 14

C) Argon

Question 15

Who is known for the concept of periodicity in the properties of elements?

Answer 15

Dmitri Mendeleev

Question 16

True or False: The periodic table includes only the known elements.

Answer 16

True

Question 17

What is the primary purpose of the periodic table?

Answer 17

To organize elements based on their properties and relationships.

Question 18

Fill in the blank: Elements in the same group of the periodic table have __________ properties.

Answer 18

similar

Question 19

What major change did Glenn T. Seaborg make to the periodic table?

Answer 19

He moved the actinides and lanthanides to the bottom.

Question 20

Multiple Choice: Which element was discovered by Mendeleev’s periodic table predictions? A) Technetium B) Francium C) Polonium D) Astatine

Answer 20

A) Technetium