Number of Electrons.
all elements in a period all have the same amount of shells example: all elements in period 1 has only 1 shell all elements in period 2 has 2 shells so the period number is the same as the number of shells in that period
All elements in the same horizontal row of the Periodic Table are in the same period, there are 7 periods.
The period number of an element corresponds to the energy level of its outermost electrons. Elements in the same period have the same number of electron shells. As you move from left to right across a period, the number of protons and electrons increases, resulting in higher effective nuclear charge, which affects the properties of the elements.
all elements in one period have the same number of energy levels
Elements in same period have same shell. The electron enters outermost shell.
These are called a period, or row
All of these elements belong to same period. The period number is 3.
Period 4 and period 5 of the periodic table have the same number of elements. There are 18 elements in each period. While some elements in period 4 are calcium, iron, and zinc, elements in period 5 are tin, antimony, and iodine.
a family is a column of elements a period is a row of elements
A. They have the same number of protons.B. They have the same number of orbitals.C. They have the same number of electrons.D. They have the same number of neutrons.
In the Periodic Table Of Elements, elements are not necessarily similar under the same period. But, they are similar under the same group. they only have one thing in particular they have the same amounts of shells for the atoms
All elements comprising the period 7 in the periodic table are radioactive. In total this period has 32 elements.