Table of Contents
How many outer shells does thallium have?
three electrons
Aluminum, gallium, indium, and thallium have three electrons in their outermost shell (a full s orbital and one electron in the p orbital) with the valence electron configuration ns2np1.
How many electrons are in the outermost shell?
eight electrons
The outermost shell in an atom cannot have more than eight electrons even if it has a capacity to take up more electrons. This is also called the octet rule.
How many electrons does thallium have?
81 electrons
A thallium atom has 81 electrons, arranged in the electron configuration [Xe]4f145d106s26p1; of these, the three outermost electrons in the sixth shell are valence electrons.
What is the group number of thallium?
13
Fact box
| Group | 13 | 304°C, 579°F, 577 K |
|---|---|---|
| Period | 6 | 1473°C, 2683°F, 1746 K |
| Block | p | 11.8 |
| Atomic number | 81 | 204.38 |
| State at 20°C | Solid | 205Tl |
How do you find outermost shell?
Use the group numbers to determine the number of valence electrons. The Group number of a non-transition metal can be used to find the number of valence electrons in an atom of that element. The ones place of the group number is the number of valence electrons in an atom of these elements.
What is the complete electron configuration of thallium?
Xe 4f14 5d10 6s2 6p1
Thallium/Electron configuration
What group is thallium in?
Group 13
Fact box
| Group | 13 | 304°C, 579°F, 577 K |
|---|---|---|
| Atomic number | 81 | 204.38 |
| State at 20°C | Solid | 205Tl |
| Electron configuration | [Xe] 4f145d106s26p1 | 7440-28-0 |
| ChemSpider ID | 4514293 | ChemSpider is a free chemical structure database |
How can thallium form a 1+ ion?
It has the electron configuration [Xe] 2s22p1 and has a +3 or +1 oxidation state. As stated above, because thallium is heavy, it has a greater stability in the +1 oxidation state (inert pair effect). Therefore, it is found more commonly in its +1 oxidation state.
How do you find the outermost shell?
So we can use the column or group of an element to determine the number of electrons in its outermost shell, sometimes referred to as valence electrons. Elements from the fourth column of the periodic table, like carbon, have four electrons in their outermost electron shell or four valence electrons.
How many neutrons protons and electrons does thulium have?
Name Thulium Atomic Mass 168.934 atomic mass unit Number of Protons 69 Number of Neutrons 100 Number of Electrons 69
How do you determine the number of neutrons in an atom?
To find the number of neutrons in an atom of the isotope, simply subtract the number of protons (atomic number). So, carbon-13 has 7 neutrons, because carbon has atomic number 6.
What is the number of neutrons in an element?
The atomic number of the element equals the number of protons. Calculating the number of neutrons then becomes atomic mass of the isotope minus the atomic number of the element equals the number of neutrons. For uranium-235, atomic number 92, the number of neutrons is 235-92=143, or 143 neutrons.
What period is thallium in?
Thallium Element: Thallium is an element in the 13 th group and 6 th period of periodic table. It is a grey post-transition metal.