Dmitri Mendeleev and the Periodic Table

Fill in the blank: Dmitri Mendeleev was a Russian _______ and teacher.

• Physicist

• Chemist

• Biologist

• Mathematician

What was the main purpose of Mendeleev's periodic table?

• To classify chemical elements

• To measure atomic mass

• To discover new elements

• To create a new language.

True or False: Mendeleev predicted the atomic masses of some elements that were not yet discovered.

• True

• False

Mendeleev's mother became the manager of a ______.

• school

• glass factory

• hospital

• library

In which city did Mendeleev enroll in school after traveling with his mother?

• Moscow

• St. Petersburg

• Paris

• London

What was the critical reason for people's difficulty in understanding chemistry according to Mendeleev?

• Lack of textbooks

• Lack of a clear system

• Lack of teachers

• Lack of interest

Mendeleev's breakthrough was combining atomic weight with ______.

• A) chemical properties

• B) physical states

• C) molecular structures

• D) common properties

Mendeleev left blank spaces in his chart to represent ____.

• Known elements

• Unknown elements

• Elements with similar properties

• Elements with different atomic numbers

The periodic table was accepted due to the accuracy of Mendeleev's ____.

• Calculations

• Predictions

• Experiments

• Theories

Mendeleev's table helped predict the properties of elements that ____.

• Were already known

• Had not yet been discovered

• Were unstable

• Were synthetic

Tags

NGSS.HS-PS1-1