They change with atomic number.
Atomic Mass Octaves and Triads
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.
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.
You look at trends. An element is likely to have properties somewhere between the element above it and the element below it; if there's nothing below it (or above it), then you can follow the general trend up (or down) that column and extrapolate.
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.
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.
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.
They change with atomic number.
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.
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.
No
Periodic trends illustrate how some elements are very reactive while others are stable.
in 1869 periodic trends in the properties of the then-known elements
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.
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.
For periodic trends we will examine1- Electronic configuration 2- Ionization energy 3- Atomic radius