Period –
reactivity increases as you go from the left to the right
. Group – reactivity decreases as you go down the group.
Does reactivity increase down a group?
The reactivity of group 1 elements
increases as you go down the
group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.
Does reactivity increase down a period?
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. Period –
reactivity increases as you
go from the left to the right across a period.
What increases down a period?
In general,
ionization energy
increases across a period and decreases down a group. Across a period, effective nuclear charge
Does reactivity increase or decrease as you go down?
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 is the least reactive element?
Noble gases
are the least reactive of all known elements. That’s because with eight valence electrons, their outer energy levels are full. The only exception is helium, which has just two electrons.
Why is group 1 more reactive as you go down?
The reactivity of group 1 elements increases as you go down the group because:
the atoms become larger
.
the outer electron becomes further from the nucleus
.
the force of attraction between the nucleus and the outer electron decreases
.
Why does Zeff increase across a period?
More electronegative elements hold the bond electrons “tighter” or closer to themselves. … Higher ionization energy means that it takes more energy to remove one electron from an atom. Ionization energy
increases
across a period. Going across a period, Effective Nuclear
Why atomic size decreases across a period?
Across a period,
effective nuclear charge
What element in the second period has the largest atomic radius?
Atomic Radius of all the elements in the Periodic Table.
Lithium
, is the largest element in the second period.
Why does reactivity decrease in a period?
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 makes an element more or less reactive?
The
number of electrons in the outermost shell of an atom
determines its reactivity. Noble gases have low reactivity because they have full electron shells
How can you tell which element is more reactive?
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. Lithium, sodium, and potassium all react with water, for example.
Which is more reactive N or NE?
Neon: 1s2, 2s2, 2p6. As we can see from the electronic configurations, neon has a fully filled outer shell and hence is
non-reactive
. … Hence, it is much easier for oxygen to complete its octet, as compared to nitrogen and that is why, oxygen is more reactive than nitrogen. Hope this helps.
What is the least reactive element in period 3?
Silicon
. Silicon (symbol Si) is a group 14 metalloid. It is less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table, but more reactive than germanium, the metalloid directly below it in the table.
Which element mentioned above is highly reactive?
Hydrogen
is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements.
