periodic table Flashcards
(27 cards)
What is the periodic table?
A tabular arrangement of chemical elements organized by their atomic number, electron configuration, and recurring chemical properties.
True or False: The periodic table is organized by increasing atomic mass.
False
What is the atomic number of an element?
The number of protons in the nucleus of an atom of that element.
Fill in the blank: Elements in the same column of the periodic table are called __________.
groups or families
What information does each box on the periodic table contain?
The element’s atomic number, symbol, name, and atomic mass.
Which element has the atomic number 1?
Hydrogen
True or False: Noble gases are found in Group 18 of the periodic table.
True
What are the three main categories of elements in the periodic table?
Metals, nonmetals, and metalloids.
Which element is represented by the symbol ‘O’?
Oxygen
What do elements in the same period have in common?
They have the same number of electron shells.
Fill in the blank: The rows of the periodic table are called __________.
periods
What is the most abundant element in the universe?
Hydrogen
Which group of elements is known for being highly reactive and includes lithium, sodium, and potassium?
Alkali metals (Group 1)
True or False: Transition metals are located in Groups 3-12 of the periodic table.
True
What is the significance of the zigzag line on the periodic table?
It separates metals from nonmetals and indicates the location of metalloids.
Which element has the highest atomic number currently known?
Oganesson (Og), atomic number 118.
What are lanthanides and actinides?
Two series of elements that are placed below the main body of the periodic table, consisting of rare earth elements and radioactive elements, respectively.
Fill in the blank: The periodic table was first organized by __________.
Dmitri Mendeleev
What does the term ‘valence electrons’ refer to?
Electrons in the outermost shell of an atom that are involved in chemical bonding.
Which element is a liquid at room temperature?
Mercury (Hg)
True or False: All metals are solid at room temperature.
False
What is the symbol for Gold?
Au
What is the primary purpose of the periodic table?
To provide a useful framework for understanding the relationships between different elements.
What are halogens?
Group 17 elements that are highly reactive nonmetals, including fluorine, chlorine, and iodine.
