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- fluorine is the most electronegative of the elements
- caesium is the least electronegative
Source: The widely quoted Pauling electronegativity of 0.7 for francium is an extrapolated value of uncertain provenance. The Allen electronegativity of caesium is 0.66.
What else can I help you with?
How can the properties of elements be pridicited according to periodic law?
They change with atomic number.
What periodic trends did did Mendeleev organize his periodic table by?
Atomic Mass Octaves and Triads
What trends were seen in Mendeleev?
In Mendeleev's periodic table, several key trends were observed, including the periodicity of element properties such as atomic mass, reactivity, and valence. He arranged elements in order of increasing atomic mass, which revealed recurring patterns in their chemical behavior. Mendeleev also left gaps for undiscovered elements, predicting their properties based on the trends he observed, which demonstrated the predictive power of his periodic arrangement. This laid the groundwork for the modern periodic table, where elements are organized by atomic number.
How can the periodic table be used to predict the properties of an element that has not been discovered?
It can't. the properties of an element determine it's group placement, without knowledge of these properties (or, indeed, the element itself) it would be impossible to place an element in it's proper place on the periodic table.
Why Mendeleev left a for the unknown element germanium in his periodic table?
Mendeleev left a gap for the unknown element germanium in his periodic table because he predicted that there were elements yet to be discovered that would fit into the spaces based on their properties and atomic weights. He recognized that the periodic trends indicated the existence of elements that had not yet been identified, allowing him to maintain the integrity of the table. This foresight was later validated when germanium was discovered, confirming Mendeleev's predictions about the periodic nature of elements.
How are the trends in the periodic table helpful in identifying an element?
The periodic trends that arise from the arrangement of the periodic table provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or period and the periodic nature of the elements.
What are 2 reasons for studying the periodic table?
Periodic table of elements provides us a lot of information about element's intrinsic properties. We can get the atomic weight of an element by looking at the periodic table. Trends about the electronegativity and atomic size can also be computed.
How does one recognize a periodic trend on the periodic table-?
Periodic trends refer to the repeating pattern of properties of elements as you move across a period or down a group on the periodic table. These trends can be recognized by observing how a particular property (such as atomic radius, electronegativity, or ionization energy) changes in a predictable way based on the element's position in the table. By comparing the properties of elements in a specific order, you can identify and analyze periodic trends.
How can the properties of elements be pridicited according to periodic law?
They change with atomic number.
Which scientific method could be used to predict the properties of an element?
One scientific method that could be used to predict the properties of an element is the periodic table. By examining an element's position on the periodic table, one can make predictions about its atomic structure, reactivity, and physical properties based on trends and patterns observed among elements in the same group or period.
Which element defies the laws of chemistry?
No element defies the laws of chemistry. All elements follow the fundamental principles of chemistry, such as the periodic table trends, reactivity, and bonding behavior.
What are the names of the trends in the periodic chart?
No
How do periodic trends illustrate and change in chemistry?
Periodic trends illustrate how some elements are very reactive while others are stable.
The periodic table is called periodic because the?
in 1869 periodic trends in the properties of the then-known elements
How you can know that which element is mor reactive?
It depends on the placing of the element in the periodic table. For the far left, group 1, the most reactive element is the one closest to the bottom. For the far right, the most reactive is the one closest to the top. The table follows certain trends, depending on it's placement in the periodic table. By learning these trends, you'll be able to tell at a glance. For example, Francium, the bottom-left most element only ever exists for a fraction of a second; it's so reactive, it reacts when it is created.
What are names of the trends in the periodic chart?
Atomic size decreases from left to right in a period hence ioniztion energy increases from left to right.But atomic size increases from top to bottom in a group hence ionization energy decreases from top to bottom.
Why is sodium the eleventh element?
Sodium is the eleventh element because it has 11 protons in its nucleus. In the periodic table, elements are arranged in order of increasing atomic number, which is determined by the number of protons in the nucleus. Sodium's atomic number of 11 places it in the eleventh position in the periodic table.
