Perdioc Table Flashcards
What is the primary purpose of the periodic table?
To organize and classify chemical elements based on their properties.
True or False: The periodic table is arranged in order of increasing atomic number.
True
What do the columns in the periodic table represent?
Groups or families of elements with similar chemical properties.
Fill in the blank: The horizontal rows in the periodic table are called __________.
Periods
Which element has the atomic number 1?
Hydrogen
What are the three main categories of elements in the periodic table?
Metals, nonmetals, and metalloids.
What is the significance of the atomic mass listed on the periodic table?
It represents the average mass of an element’s isotopes.
True or False: Noble gases are found in group 18 of the periodic table.
True
Which element is represented by the symbol ‘Fe’?
Iron
What is the name of the group that contains lithium, sodium, and potassium?
Alkali metals
Fill in the blank: Elements in the same group typically have the same number of __________.
Valence electrons
What is the main characteristic of transition metals?
They can form variable oxidation states and colored compounds.
Which element is a liquid at room temperature?
Mercury
True or False: The lanthanides and actinides are part of the main body of the periodic table.
False
What is the term for elements that have similar chemical behavior and are in the same column?
Group
Which element is known as the ‘building block of life’?
Carbon
What is the atomic number of oxygen?
8
Fill in the blank: The periodic table was first organized by __________.
Dmitri Mendeleev
What distinguishes metalloids from metals and nonmetals?
They have properties of both metals and nonmetals.
True or False: All elements in the periodic table are stable.
False
What is the name given to the vertical columns in the periodic table?
Groups
Which group contains elements that are highly reactive and are known as halogens?
Group 17
What is the electron configuration of a neutral atom of sodium (Na)?
1s² 2s² 2p⁶ 3s¹
Fill in the blank: The periodic table is divided into __________ and __________ sections.
Main group elements, transition metals
What are the properties of alkali metals?
They are soft, highly reactive, and have one valence electron.
True or False: The atomic radius generally decreases across a period.
True
Which element is the most electronegative?
Fluorine
What is the primary characteristic of noble gases?
They are inert and do not readily form compounds.
What does the term ‘ionization energy’ refer to?
The energy required to remove an electron from an atom.
Fill in the blank: The element with atomic number 26 is __________.
Iron
What is the name of the two rows of elements placed below the main body of the periodic table?
Lanthanides and actinides
True or False: All metals are solid at room temperature.
False
Which group contains the least reactive elements?
Noble gases
What is the main difference between isotopes of an element?
They have different numbers of neutrons.
What is the relationship between atomic number and the number of protons in an atom?
They are the same; the atomic number is equal to the number of protons.
Fill in the blank: The periodic table is a tool used in __________ to predict the behavior of elements.
Chemistry
