Elements Identification
How many atoms are there in the periodic table of elements?
118
What is the trend of the electronegativity as you move down the group (column)?
It decreases from top to bottom within the group
Vertical columns on the periodic table are called ________.
Groups
He is known as the “Father of the Periodic Table.”
Dmitri Mendeleev
The element with atomic number 1, used in rocket fuel and stars.
Hydrogen
Define ionization energy
It is the energy required to remove an electron from an atom
Elements in the same group share similar ________.
Chemical properties
He arranged elements in increasing atomic number, leading to the modern periodic table.
Henry Moseley
How many electrons fit on the third energy level for the atomic number of 21 and above?
18
A shiny metal used in airplanes; atomic mass of 9.012
Beryllium (Be)
Which group (name) has the highest ionization energies?
Group 18 (Noble gases)
The highly reactive metals found in Group 1 are called ________.
Alkali metals
He arranged elements by increasing atomic mass and noticed a repeating pattern every 8 elements (Law of Octaves).
John Newlands
An element used in fertilizers and DNA, represented by the "P" symbol.
Phosphorus
What element has the largest electronegativity?
Flourine
The large block of metals in the center of the periodic table (Groups 3–12) are called ________.
Transition metals
The scientist who first discovered that elements can be grouped into metals, nonmetals, and gases.
Antoine Lavoisier
It is used in bulbs and lasers with atomic number 18.
Which belongs to what group?
What is the largest atom in Group 4A?
Lead
The number that indicates how many valence electrons an element has is the ________ number.
Group
Discovered noble gases, which led to a new Group 18 in the periodic table.
William Ramsay