What has an atomic mass of 71?
Lutetium The elements of the periodic table sorted by atomic mass
| Atomic Mass | Name chemical element | number |
|---|---|---|
| 173.04 | Ytterbium | 70 |
| 174.967 | Lutetium | 71 |
| 178.49 | Hafnium | 72 |
| 180.9479 | Tantalum | 73 |
What is the atomic mass of gallium 70?
69.92602 Gallium-70
| PubChem CID | 6337546 |
|---|---|
| Structure | Find Similar Structures |
| Molecular Formula | Ga |
| Synonyms | Gallium-70 14391-74-3 70Ga Gallium, isotope of mass 70 |
| Molecular Weight | 69.92602 |
How many neutrons are in gallium-71?
Gallium-71 is composed of 31 protons, 40 neutrons, and 31 electrons.
What is the isotope symbol for gallium-71?
Ga Gallium-71 | Ga – PubChem.
How do you find the atomic mass of gallium?
69.723 uGallium / Atomic mass
How do u calculate atomic mass?
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
How many protons does Gallium 70?
Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of gallium-70 (atomic number: 31), an isotope of this element. The nucleus consists of 31 protons (red) and 39 neutrons (orange).
How many neutrons the element with 71 protons has?
Main Isotopes of Lutetium Lu is the most common isotope, having a natural abundance of approximately 97%. Lutetium-175 is composed of 71 protons, 104 neutrons, and 71 electrons.
How many electrons are in an atom of 71ga?
Okay, and that looks like the third answer choice there 31 electrons is the answer for this question for this atom of gallium.
What is the mass number of gallium?
69.723 uGallium / Atomic mass Atomic mass of Gallium is 69.723 u. Therefore this resulting atomic mass is calculated from naturally-occurring isotopes and their abundance.
Why is the average atomic mass of gallium closer to 69 than it is to 71?
Also observe that the answer is closer to 69 than it is to 71, which makes sense since gallium-69 makes up a greater proportion of gallium in the universe ( ~60% ) than gallium-71 does ( ~30% ).
What do you call the element from atomic number 57 to 71?
lanthanoid, also called lanthanide, any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71). With scandium and yttrium, they make up the rare-earth metals.
How do you calculate atomic number?
The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11.
How do we find atomic mass?
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
What is the electronic configuration of 71?
The electronic configuration of element X with atomic number 71 is (Xe)4f 146s25d1.
How many neutrons are in gallium 70?
Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of gallium-70 (atomic number: 31), an isotope of this element. The nucleus consists of 31 protons (red) and 39 neutrons (orange).
Does Ga-69 or Ga-71 have a greater abundance?
Explanation. Ga-69 must be more abundant because the atomic mass of gallium is closer to the mass Ga-69 than the mass of Ga-71.
How do we calculate average atomic mass?
To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together. Whenever we do mass calculations involving elements or compounds (combinations of elements), we always use average atomic masses.
What is the Valency of element with atomic number 71?
3 Solution : Element with atomic number `71 (4f^(14) 5d^(1) 6s^(2))` is Lu (lutetium) which is a lanthanoide and belongs to group 3. Its valency is 3.
Which lanthanide is largest in size from atomic number 58 to 71?
The lanthanides comprise the largest naturally-occurring group in the periodic table….30.1. Introduction. (1)
| Element | Terbium, Tb(a) |
|---|---|
| Discoverer | C. G. Mosander |
| Date | 1843 |
| Origin of name | Ytterby |
How do u calculate mass?
One way to calculate mass: Mass = volume × density. Weight is the measure of the gravitational force acting on a mass.
Is mass number and atomic mass same?
Mass number is a whole number because it is the sum of number of proton and number of neutrons whereas atomic mass is fractional because it is the average relative mass of its atoms as compared with mass an atom of C-12 isotope taken as 12.
What is the 72nd element?
The element is number 72 in the periodic table, and is called hafnium. It takes its name from hafnium, the old Latin name for Copenhagen which is the city in which it was first isolated in 1922.
What number is lawrencium on the periodic table?
103 Fact box
| Group | Actinides | 1627°C, 2961°F, 1900 K |
|---|---|---|
| Atomic number | 103 | (262) |
| State at 20°C | Solid | 262Lr |
| Electron configuration | (Rn) 5f147s27p1 | 22537-19-5 |
| ChemSpider ID | 28934 | ChemSpider is a free chemical structure database |
What is the mass of gallium?
69.723 uGallium / Atomic mass
How do you find the atomic number?
The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11.
How do you find the atomic mass of protons and electrons?
0:0113:12How To Calculate The Number of Protons, Neutrons, and ElectronsYouTube
What is the atomic number of the element with 71 protons?
Lutetium Lutetium is a chemical element with the symbol Lu and atomic number 71.
What is the electronic configuration of element 71?
The electronic configuration of element X with atomic number 71 is (Xe)4f 146s25d1.
What are elements with atomic number 58 and 71?
The Lanthanides. The lanthanides , elements 58-71, follow lanthanum on the periodic table.