The Periodic Table Flashcards
(27 cards)
What is the periodic table?
A tabular arrangement of chemical elements organized by atomic number, electron configuration, and recurring chemical properties.
Who is credited with creating the first periodic table?
Dmitri Mendeleev.
True or False: The periodic table is arranged in rows called periods and columns called groups.
True.
What does the atomic number of an element represent?
The number of protons in the nucleus of an atom.
Fill in the blank: Elements in the same group of the periodic table have similar __________.
chemical properties.
What are the two main categories of elements on the periodic table?
Metals and nonmetals.
Which group contains the noble gases?
Group 18.
What is the significance of the ‘stair-step’ line on the periodic table?
It separates metals from nonmetals and indicates metalloids.
True or False: All elements in the same period have the same number of energy levels.
True.
What element has the atomic number 1?
Hydrogen.
What do you call elements that have similar properties and are found in the same column?
Groups or families.
Which element is the most abundant in the universe?
Hydrogen.
What is the periodic law?
The properties of elements are a periodic function of their atomic numbers.
Fill in the blank: Alkali metals are found in group __________.
1.
What are transition metals?
Elements found in groups 3 to 12 that have partially filled d orbitals.
True or False: Lanthanides and actinides are found in the main body of the periodic table.
False.
What is the approximate atomic mass of carbon?
12.01 u.
Which element is represented by the symbol ‘Fe’?
Iron.
What are the two main types of bonding that can occur between elements?
Ionic and covalent bonding.
Fill in the blank: The most reactive group of nonmetals is the __________.
halogens.
What is the general trend in atomic radius across a period?
It decreases from left to right.
What is electronegativity?
A measure of an atom’s ability to attract and bond with electrons.
What is the primary characteristic of metalloids?
They have properties intermediate between metals and nonmetals.
True or False: The periodic table is fixed and does not change.
False.
