AnswersDriveThus the "barium" in "barium 137" means 56 protons. And the 137 for the mass number designates 137 total protons protons plus neutrons. To get just the number of neutrons you take the difference between protons and mass number, thus 137−56=81 .
How many electron shells are there in barium?
Data Zone
| Classification: | Barium is an alkali earth metal |
|---|---|
| Protons: | 56 |
| Neutrons in most abundant isotope: | 82 |
| Electron shells: | 2,8,18,18,8,2 |
| Electron configuration: | [Xe] 6s2 |
1
What is the half life of Barium 137m?
The parent isotope Cs-137 with a half-life of 30.1 years beta decays (94.6%) to the metastable state of Ba-137m. This further decays by gamma emission (662 keV) with a half-life of 2.6 min. to the stable Ba-137 element.
2
Is the barium radioactive?
The one radioactive isotope, Ba-130, has a half life of about 10^21 years, or about 100 million times the age of the universe. So, yes, the barium sulfate used for x-ray contrast studies is, technically, radioactive.
3
How many isotopes does barium?
Isotopes of barium. Naturally occurring barium (56Ba) is a mix of six stable isotopes and one very long-lived radioactive primordial isotope, barium-130, recently identified as being unstable by geochemical means (from analysis of the presence of its daughter xenon-130 in rocks).
4
How many outer valence electrons are in barium?
A barium (Ba) atom has 2 valence electrons. Valence electrons are the outermost electrons in an atom, which affect how atoms might react with one
5
How many electrons does barium?
| Name | Barium |
|---|---|
| Atomic Mass | 137.327 atomic mass units |
| Number of Protons | 56 |
| Number of Neutrons | 81 |
| Number of Electrons | 56 |
6
Is Krypton radioactive?
kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps.
7
What is the use of barium?
Barium compounds are added to fireworks to impart a green color. Barium sulfate is used as an insoluble additive to oil well drilling fluid, as well as in a purer form, as X-ray radiocontrast agents for imaging the human gastrointestinal tract.
9
What has 56 protons?
Answer: (a) 56 protons, 56 electrons, and 82 neutrons; (b) 15 protons, 15 electrons, and 16 neutrons. (a) The superscript 197 is the mass number, the sum of the number of protons plus the number of neutrons. Magnesium has three isotopes, with mass numbers 24, 25, and 26.
10
How many electrons are in the outer shell of a barium atom?
Barium has 6 electron shells with an equal sequence of electrons in each; the progression is: 2 - 8 - 18 - 18 - 8 - 2. The electron shells are therefore progressively equal in thickness and number of particles from inner to outer shells. barium has 56 electrons and 6 electron shells.
11
How many protons and electrons does 02 have?
Oxygen has atomic number eight. This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons. In an oxygen ion with a 2− charge, the number of protons is still 8, but the number of electrons is 10.
12
Where Barium was discovered?
In the late 18th century, barium oxide (BaO) and barium carbonate (BaCO3) were discovered by German chemist Carl Scheele and English chemist William Withering, respectively. Pure barium metal was not isolated and identified until 1808 at the Royal Institution in London.
13
Do all elements have neutrons?
All elements have atoms with neutrons except for one. A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus. That tiny little atom (the tiniest of all) has only one electron and one proton.
14
What element has an atomic mass of 131?
The symbol used here indicates the atomic number (number of protons) is 53. This fact is redundant because the letter I indicates the element is iodine and iodine has 53 protons. The mass number (number of protons plus neutrons) is 131. By deduction, has: 131-53=78 neutrons.
15
How many neutrons are in lead 207?
The notation "lead-204" means the isotope of lead that has a mass number of 204. Since lead has 82 protons, the number of neutrons in an atom of lead-204 is 204-82=122. Similarly, lead-206 has 124 neutrons, lead-207 has 125 neutrons and lead-208 has 126 neutrons.
16
What is the name of the element with 26 protons?
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| Element | Symbol | Number of Protons (Atomic #) |
|---|---|---|
| Manganese | Mn | 25 |
| Iron | Fe | 26 |
| Lead | Pb | 82 |
| Gold | Au | 79 |
17
How many electrons are in a barium ion?
Barium's atomic number is 56; this means that it has 56 protons in its nucleus and also puts it as a period 6 element. An uncharged barium atom would have 56 electrons also. However as a group 2 element barium easily loses 2 electrons to form the +2 cation. The ion has 56-2=54 electrons.
18
What is the element with five protons and six neutrons?
Atomic Number
| Name | Protons | Neutrons |
|---|---|---|
| Lithium | 3 | 4 |
| Beryllium | 4 | 5 |
| Boron | 5 | 6 |
| Carbon | 6 | 6 |
19
How many protons electrons and neutrons are in bismuth?
It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass units). All of the primordial bismuth is of this isotope.