the periodic table Flashcards
(28 cards)
What is the atomic number of an element?
The atomic number is the number of protons in the nucleus of an atom.
True or False: The periodic table is arranged by increasing atomic mass.
False
Fill in the blank: The vertical columns in the periodic table are called ______.
groups or families
What is the chemical symbol for Gold?
Au
What are the two main categories of elements in the periodic table?
Metals and nonmetals
Which element has the atomic number 1?
Hydrogen
What do elements in the same group of the periodic table have in common?
They have similar chemical properties.
True or False: Noble gases are highly reactive.
False
What is the name of the horizontal rows in the periodic table?
Periods
Which element is the most abundant in the universe?
Hydrogen
Fill in the blank: The elements in group 1 are known as ______ metals.
alkali
What is the main characteristic of transition metals?
They can form variable oxidation states and have high melting points.
What is the chemical symbol for Sodium?
Na
Which element has the highest electronegativity?
Fluorine
True or False: Lanthanides and actinides are found in the main body of the periodic table.
False
What type of bond do nonmetals typically form?
Covalent bonds
What is the name of the group that contains elements like lithium, sodium, and potassium?
Alkali metals
What is the significance of the atomic mass in the periodic table?
It represents the average mass of an element’s isotopes.
Which element is represented by the symbol ‘Fe’?
Iron
Fill in the blank: The periodic table was first organized by ______.
Dmitri Mendeleev
What do you call elements that have properties of both metals and nonmetals?
Metalloids
What is the general trend of electronegativity across a period?
Electronegativity increases from left to right.
True or False: The majority of the periodic table consists of metals.
True
What is the term for the energy required to remove an electron from an atom?
Ionization energy
