Group Number/Metals
What group number is halogens?
7
What is ionization energy?
The energy needed to remove an electron from the valence shell of an atom.
Which radius is larger a neutral non-metal atom or the ion of the same atom?
The non-metal ion is larger
What is electron affinity?
Electron affinity is the energy that is released by an atom when it gains an electron
What period 4 element has 6 valence electrons?
Selenium
What group number is noble gases
8
What is the lower first ionization energy?
Na or Rb
Rb
What is the atom that has the most metallic?
Li or Be
Li
What group has the highest electron affinities
The halogens (7A) have the highest electron affinities and are most likely to gain an electron.
What is the only nonmetal with four valence electrons?
arbon
Most reactive metal
Francium
What is lower first ionization energy?
S or P
S
What is the atom that has the most metallic?
Sn or P
Sn
Which atoms do not want to gain electrons?
The noble gases (8A) are least likely to gain an electron.
During most chemical reactions, what happens to the atoms of a halogen?
They gain one electron.
What group number is the akali metals
1
Why does the ionization energy change as you move down a group or family?
Atoms become larger as you move down a group, therefore the valence electrons get farther away from the nucleus and are held less tightly by it, so they are easier to remove.
Which radius is smaller a neutral metal atom or the ion of the same atom?
The ionic radius is smaller than the atomic radius
Which alkaline earth metal has the highest electron affinity?
Be
Which block contains all of the metalloids?
P
Most reactive non-metal
Fluorine
Why does the ionization energy change as you move across a period?
Atoms become smaller as you move from left to right, so their electrons are closer and more strongly held by the nucleus, therefore they are harder to remove
what is an ion?
An ion is an atom or group of atoms that has a
positive or negative charge.
Electron affinity is the amount of energy _____ when an extra electron is added to a neutral gaseous atom.
Released
What causes each new horizontal row of the periodic table?
A new principal energy level begins.