CK12- Periodic Table

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

• Their atomic number
• Their number of neutrons
• Their number of electrons
• Their atomic mass

What did Mendeleev use to organize the elements?

• A periodic table
• A set of flashcards
• A chemistry textbook
• A deck of playing cards

What is the significance of the periodicity in Mendeleev's periodic table?

• It proves that Mendeleev's predictions were correct
• It helps scientists find elements more easily
• It shows that elements have similar properties
• It makes the table look nice

Tags

NGSS.HS-PS1-1

What is the term used to describe elements within a group in the periodic table?

• Elements
• Periods
• Families
• Groups

What is the purpose of organizing elements in science?

• To create a hierarchy among elements
• To make it easier to find specific elements
• To make scientists' jobs more difficult
• To make the periodic table look neat

What is the term used to describe the repeating pattern in Mendeleev's periodic table?

• Predictable
• Cyclical
• Repetitive
• Periodic

What are the columns in Mendeleev's periodic table called?

• Rows
• Groups
• Periods
• Families

Why did Mendeleev leave blanks in his periodic table?

• He wanted to confuse other scientists
• He predicted that those elements would be discovered
• He was missing information about those elements
• He wanted to make the table look incomplete

What is the significance of the repeating pattern in Mendeleev's periodic table?

• It proves that Mendeleev's predictions were correct
• It makes the table look nice
• It helps scientists find elements more easily
• It shows that elements have similar properties

What is atomic mass?

• The mass of one atom of an element
• The mass of all the particles in an atom
• The number of protons in an atom
• The mass of all the electrons in an atom