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The table was organized so that elements of similar properties are in the same group. What (partly) determines reactivity is the number of electrons an atom has in it's ground state.
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Within the atom electrons are organized in shells. Atoms are stable when they have 8 electrons in their outer shell (for hydrogen and helium it is 2 electrons.)
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Elements of:
Group 18 have 8 electrons in their outer shells
Group 17 have 7 electrons in their outer shells
Group 16 have 6 electrons in their outer shells
Group 15 have 5 electrons in their outer shells
Group 14 have 4 electrons in their outer shells
Group 13 have 3 electrons in their outer shells
Groups 3-12 have varied number of electrons in their outer shells
Group 2 have 2 electrons in their outer shells
Group 1 have 1 electron in their outer shells
The group number in the Periodic Table indicates the number of valence electrons an element has. Elements with the same number of valence electrons tend to exhibit similar chemical properties and reactivity. Elements in the same group tend to react similarly because they have the same outer electron configuration.
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What are some good questions about the periodic table?
Some good questions about periodic table: where are metalloids placed? why group 18 elements are inactive? How many groups and periods are in periodic table? How reactivity changes across and down the group?
Which group in the periodic table is known as the noble gases?
The noble gases are a group of elements in the periodic table known as Group 18. These gases are colorless, odorless, and have low reactivity due to their stable electron configuration. Examples include helium, neon, argon, krypton, xenon, and radon.
An element has a very low boiling point and very low reactivity. Where on the periodic table is this element most likely to be found?
This is a noble gas (group 18).
When moving down the middle of the periodic table is there an decrease in reactivity?
In general, moving down the middle of the periodic table results in a decrease in reactivity for transition metals. This is because as you move down a group, the valence electrons are further away from the nucleus, making it harder for the atom to lose or gain electrons and therefore lowering its reactivity.
What are the rules for reactivity of metals on the periodic table?
The reactivity increases with increasing numbers of electron shells (energy levels).
What happens to the reactivity as you move down group 1 in the periodic table?
Reactivity increases as you move down Group 1 in the periodic table. This is because the outermost electron is farther from the nucleus, leading to a weaker attraction and easier loss of the electron to form a positive ion.
What is the periodic trend for reactivity of metals?
Metals Period - reactivity decreases as you go from left to right across a period.Group - reactivity increases as you go down a group Why? 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.Non-metals Period - reactivity increases as you go from the left to the right across a period.Group - reactivity decreases as you go down the group. Why? The farther right and up you go on the periodic table, the higher the electronegativity, resulting in a more vigorous exchange of electron.
What family group on periodic table is xenon?
Xenon belongs to the noble gas family (group 18) on the periodic table. Noble gases are characterized by their stability and lack of reactivity due to a full valence electron shell.
What happens as you move down the family on a periodic table the reactivity?
As you move down a family on the periodic table, reactivity generally decreases. This is because the outermost energy levels are farther away from the nucleus and the electrons are shielded by more inner electrons, making it harder for the atom to react with other substances.
In group 1 in the periodic table which element is most active?
In terms of reactivity, Potassium(K) is the most reactive element among group 1 elements.
How do you tell the reactiveness of a non metal on the periodic table?
The periodicity of nonmetals is that reactivity increases from left to right across a period, through group 17, the halogens. As you move down a group, reactivity decreases. Fluorine is the most reactive element.
Metal reactivity from left to right in the periodic table.?
Decrease reactivity
What are some good questions about the periodic table?
Some good questions about periodic table: where are metalloids placed? why group 18 elements are inactive? How many groups and periods are in periodic table? How reactivity changes across and down the group?
What is a group in periodic table?
In the periodic table, a group is a vertical column of elements that share similar chemical properties due to having the same number of valence electrons. There are 18 groups in the modern periodic table, each with its own unique characteristics and reactivity patterns. Examples of groups include the alkali metals (Group 1) and the halogens (Group 17).
Is there a relationship between an elements position in the periodic table and its chemical reactivity?
Yes, there is a relationship between an element's position in the periodic table and its chemical reactivity. Elements on the left side of the periodic table (Group 1 and 2) tend to be more reactive because they readily lose electrons to form positive ions. Elements on the right side of the periodic table (Group 17 and 18) tend to be less reactive as they have a full outermost electron shell.
What element has similar properties as sulfur?
Selenium has similar properties to sulfur as they are both in the same group on the periodic table (Group 16) and share similar chemical reactivity and properties.
Differences between alkil metals and halogens?
Alkali metals are a group of elements found in Group 1 of the periodic table, known for their high reactivity and tendency to lose an electron to form a positive ion. Halogens are a group of elements found in Group 17 of the periodic table, known for their high reactivity and tendency to gain an electron to form a negative ion. Alkali metals are metals, while halogens are nonmetals.
