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What is the statement of periodic law?
the law that the properties of the elements are periodic functions of their atomic numbers. Also called Mendeleev’s law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.
Which statement best describes a period in the periodic table?
All elements in a period have the same number of electrons as there are elements in the period. The elements are arranged so that elements in a group all have the same valence subshell and thus have similar properties. All elements in a period can have up to the number of electrons as there are elements in a period.
What is the basis of Mendeleev’s periodic law?
The Mendeleev periodic table is based on the periodic law, that elements are arranged in the order of increasing their atomic weights.
What best describes a group in the periodic table?
group, in chemistry, a column in the periodic table of the chemical elements. In a group, the chemical elements have atoms with identical valence electron counts and identical valence vacancy counts. Groups are numbered from 1 to 18.
Which statement best describes the periodic trend in atomic size?
Which statement best describes the trend in atomic radii observed in the periodic table? The atomic radii increase, moving across a period to the left and down in a group.
How is the periodic law demonstrated within the groups of the periodic table?
Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”
Which statement best describes what happens as you go down a group on the periodic table?
Correct answer: Energy level increases moving down a group of the periodic table. As energy level increases, the outer valence shell becomes more distant from the nucleus, causing atomic radius to increase. Energy level remains constant across a period, but electrons are added within the same orbitals.
Which statement best describes a trend seen when moving from left to right across the periodic table?
Terms in this set (27) One of several trends found in the periodic table relates to the atomic radius or the size of an atom. The general trend in atomic radius is that moving down the periodic table, the size increases; moving across the periodic table from left to right, the size decreases.
Which of the following statements best describes the trends in the electronegativity of the periodic table?
Which best describes the trends in electronegativity on the periodic table? Electronegativity decreases down and to the right.
What is a periodic law simple definition?
Definition of periodic law : a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties.
How the periodic law and the periodic table were developed?
The periodic law was developed independently by Dmitri Mendeleev and Lothar Meyer in 1869. Mendeleev created the first periodic table and was shortly followed by Meyer. Meyer formed his periodic law based on the atomic volume or molar volume, which is the atomic mass divided by the density in solid form.
What is stated in the modern periodic law?
Modern Periodic Law Modern Periodic Law Definition. ” The physical and chemical properties of the elements are periodic functions of their atomic numbers “. Recommended Videos The Modern Periodic Table. Classification of the Elements in the Periodic Table: Elements of group 18 of the modern periodic table are considered a noble gas.
What is an example of periodic law?
In addition to these properties, there are other characteristics associated with Periodic Law, which may be considered properties of element groups. For example, all of the elements in group I (alkali metals) are shiny, carry a +1 oxidation state, react with water , and occur in compounds rather than as free elements.
What is the definition of periodic law?
Definition of periodic law. : a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties.
What is the periodic law of elements?
In chemistry, Periodic law is the arrangement of the elements in order of increasing atomic number, that is, the total number of protons in the atomic nucleus and their physical and chemical properties recur in a pattern with the increasing atomic number.