What are the horizontal rows of the periodic table called?
Quick Answer
On the periodic table, the seven horizontal rows are called periods. On the left-hand side of the periodic table, the row numbers are given as one through seven. Moving across a period from left to right, the atomic number of the elements increases.
Continue ReadingFull Answer
Rows six and seven contain elements called transition elements, which are subdivided into the actinide and lanthanide series. While the elements numbered 58 through 71 are the lanthanide series, elements with the numbers 90 through 103 are the actinide series.
The vertical columns on this table are called groups. Groups are sometimes called families because the elements in them share certain physical and chemical properties. In the older system, these groups were given the Roman numerals I through VIII. In the new system, they are designated as groups 1 through 18.
Learn more about Atoms & MoleculesRelated Questions
-
Q:
Where is tungsten found on the periodic table?
A: Tungsten is number 74 on the Periodic Table of Elements. It is located between tantalum, number 73, and rhenium, 75. On the periodic table, the elements ar... Full Answer >Filed Under: -
Q:
What does the periodic table tell us?
A: The Periodic Table offers basic information about each one of the known chemical elements. Each element has its own box in the table, and these boxes inclu... Full Answer >Filed Under: -
Q:
What happens when electrons lose energy and return to their initial or ground state?
A: Electrons sometimes absorb energy and shift to an excited state for short periods of time. When they lose the excess energy, the energy is released as a ph... Full Answer >Filed Under: -
Q:
How does electronegativity vary within groups and across periods?
A: Electronegativity tends to decrease moving down a group and tends to increase traversing left to right across periods. Electronegativity tends to decrease ... Full Answer >Filed Under:
