Table of Contents
- 1 What is the trend in reactivity across a period in the periodic table?
- 2 What happened to the activity of metal across a period?
- 3 What periodic trend does nonmetal reactivity rely on?
- 4 What trend can be seen in the periodic table when looking at the reactivity of metals?
- 5 What is the periodic trend in electron affinity down a group?
- 6 How are periodic trends measured on the periodic table?
- 7 Where are the most metallic elements on the periodic table?
What is the trend in reactivity across a period in the periodic table?
Chemical reactivity of the elements Period – reactivity decreases as you go from left to right across a period. The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity.
What happened to the activity of metal across a period?
Across each period, from left to right, the increasing attraction between the nuclei and the outermost electrons causes the metallic character to decrease. Conversely, non-metallic character generally decreases down groups and increases across a period.
What is meant by periodic trends in the modern periodic table?
Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
Why reactivity of metals increase down group?
As we go down the group, the atom gets bigger. The bigger the atom, the further away the last electron. Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.
What periodic trend does nonmetal reactivity rely on?
Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
What trend can be seen in the periodic table when looking at the reactivity of metals?
The metallic character increases as you go down a group. Since the ionization energy decreases going down a group (or increases going up a group), the increased ability for metals lower in a group to lose electrons makes them more reactive.
Where are reactive metals on the periodic table?
The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive.
What is the trend in EA down a group?
Down a group The electron affinity decreases: As you go down a group, more energy levels are added to the atom. E- get farther away from the nucleus. Therefore, elements located farther down a group do not attract other e- as strongly as elements higher up in a group.
What is the periodic trend in electron affinity down a group?
Electron affinity decreases down the groups and from right to left across the periods on the periodic table because the electrons are placed in a higher energy level far from the nucleus, thus a decrease from its pull.
How are periodic trends measured on the periodic table?
Periodic Trends: The change in properties of elements down the groups (from top to bottom) and across the periods (from left to right) in the Periodic table is known as Periodic trends. We generally measure these trends (change in properties of elements) down the group and across the period.
Why does metallic character increase as we move down periodic table?
Metallic character increases as we move down the group because the atomic size increases which lead to easy loss of electrons. On the other hand, it decreases across a period as we move from left to right. This happens because there is an increase in nuclear charge which makes it difficult for an atom to lose electrons.
Why do elements show periodicity on the periodic table?
That’s why elements show periodicity in their physical and chemical properties in the periodic table. For example, as we move from left to right in a period, atomic size decreases. Although we find some exceptions which do not follow these periodic table trends.
Where are the most metallic elements on the periodic table?
These properties include metallic luster, formation of cations, high electrical and thermal conductivity, and malleability. Metallic character is a periodic table trend. The elements with the most metallic character are on the left side of the periodic table (except hydrogen).