Podcast
Questions and Answers
In what order did Mendeleev arrange the elements in the first Periodic table?
In what order did Mendeleev arrange the elements in the first Periodic table?
By atomic mass or properties within each column
What does the atomic number tell you about the atom of the element?
What does the atomic number tell you about the atom of the element?
How many electrons and protons are in the element
What does the atomic mass tell you about the atom of the element?
What does the atomic mass tell you about the atom of the element?
It tells you the weight of neutrons and protons
How do you know how many electrons there are surrounding the nucleus of a particular atom?
How do you know how many electrons there are surrounding the nucleus of a particular atom?
Signup and view all the answers
What does the periodic table represent?
What does the periodic table represent?
Signup and view all the answers
The group number represents the number of ______ in the outermost shell.
The group number represents the number of ______ in the outermost shell.
Signup and view all the answers
How many electrons can each energy level hold for each shell, #1-#4?
How many electrons can each energy level hold for each shell, #1-#4?
Signup and view all the answers
What is the last element in period 4?
What is the last element in period 4?
Signup and view all the answers
Elements in each group number all have what in common?
Elements in each group number all have what in common?
Signup and view all the answers
Define element.
Define element.
Signup and view all the answers
What is the maximum number of shells an electron can have?
What is the maximum number of shells an electron can have?
Signup and view all the answers
Which atomic particles are found in the nucleus and what are their charges?
Which atomic particles are found in the nucleus and what are their charges?
Signup and view all the answers
Which particle has a negative charge?
Which particle has a negative charge?
Signup and view all the answers
How would you label MOST reactive to LEAST reactive on the periodic table?
How would you label MOST reactive to LEAST reactive on the periodic table?
Signup and view all the answers
What is an ion?
What is an ion?
Signup and view all the answers
What is an isotope?
What is an isotope?
Signup and view all the answers
What do you call a column in a periodic table?
What do you call a column in a periodic table?
Signup and view all the answers
Who suggested that electrons travel around the nucleus in definite paths?
Who suggested that electrons travel around the nucleus in definite paths?
Signup and view all the answers
Who performed an experiment proving the existence of an atomic nucleus?
Who performed an experiment proving the existence of an atomic nucleus?
Signup and view all the answers
Who discovered that there are small particles inside the atom?
Who discovered that there are small particles inside the atom?
Signup and view all the answers
Who performed an experiment proving the existence of electrons?
Who performed an experiment proving the existence of electrons?
Signup and view all the answers
An isotope of Chlorine would have how many neutrons?
An isotope of Chlorine would have how many neutrons?
Signup and view all the answers
What do we call a row of elements on the periodic table?
What do we call a row of elements on the periodic table?
Signup and view all the answers
What does the zigzag line on the periodic table tell you?
What does the zigzag line on the periodic table tell you?
Signup and view all the answers
What 2 atomic particles do I add together to find an element's atomic mass?
What 2 atomic particles do I add together to find an element's atomic mass?
Signup and view all the answers
Study Notes
Atomic Structure and Properties
- Mendeleev arranged elements in the first Periodic Table by atomic mass and similar properties.
- The atomic number identifies the number of protons and electrons in an element.
- Atomic mass indicates the combined weight of neutrons and protons in the atom.
- The number of electrons surrounding the nucleus equals the atomic number (also the number of protons).
- Atomic particles found in the nucleus include neutrons (neutral charge) and protons (positive charge).
- Electrons have a negative charge.
Periodic Table Organization
- The periodic table represents electron shells where elements are organized by energy levels.
- Group numbers reflect the number of valence electrons in the outermost shell.
- Elements in a group share similar chemical properties due to the same number of valence electrons.
- Maximum energy levels for electrons are 2 (1st shell), 8 (2nd & 3rd shells), and 18 (4th shell).
- The last element in Period 4 is Krypton.
- Each horizontal row in the Periodic Table is referred to as a period.
- The zigzag line on the table indicates properties of elements, differentiating metals from nonmetals.
Reactivity and Ions
- Reactivity decreases from left to right across the periodic table.
- An ion is formed when there is an unequal number of electrons compared to protons in the same element.
- An isotope contains an unequal number of neutrons of the same element.
Historical Contributions
- Niels Bohr proposed that electrons travel in definite paths around the nucleus.
- Ernest Rutherford conducted an experiment that confirmed the existence of an atomic nucleus.
- J.J. Thomson discovered particles inside the atom and proved the existence of electrons via experiments.
Atomic Mass Calculation
- To calculate an element's atomic mass, add the number of protons and neutrons.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of the periodic table with these flashcards that cover the key concepts such as atomic mass, atomic number, and the arrangement of elements by Mendeleev. Perfect for students seeking to understand the fundamentals of chemistry and the behavior of elements.
