What has a mass number of 89

Atomic MassName chemical elementnumber223Francium87226Radium88227Actinium89231.0359Protactinium91

What element has an atomic number of 89?

Actinium gives its name to a block of fifteen elements that lie between actinium and lawrencium in the periodic table with atomic numbers 89 through 103.

What element has 36 electrons and a mass number of 89?

Atomic Number of Krypton Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Krypton is Kr.

What element has 39 electrons and a mass number of 89?

Atomic Mass88.90584uElectron Configuration[Kr]5s24d1Oxidation States+3Year Discovered1794

What is MO on the periodic table?

molybdenum (Mo), chemical element, silver-gray refractory metal of Group 6 (VIb) of the periodic table, used to impart superior strength to steel and other alloys at high temperature.

Which of the following is not an actinoid?

Detailed Solution The correct answer is Option 1, i.e Terbium. Actinide series of periodic tables contains 15 elements with atomic numbers from 89 to 103. The general symbol of these elements is An. Terbium is not an actinoid.

What are elements 89 103 called?

actinoid element, also called actinide element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103).

What is the flammability of yttrium?

FIRE HAZARDS * Yttrium is a noncombustible solid, however, it is FLAMMABLE when in powdered or finely divided form. * Use a dry chemical extinguisher. * POISONOUS GASES ARE PRODUCED IN FIRE, including Yttrium Oxide fumes.

What is the charge of the nucleus of element 89?

The number indicates that every nucleus of an actinium atom has 89 protons. Therefore, the charge of an actinium atom nucleus must be +89.

How do you find the mass number?

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.

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What is a mass number in chemistry?

The mass number, (also called nucleon number), refers to the total number of protons and neutrons in the nucleus of an atom, and is used to organize the chart of nuclides. Each chemical element has a different number of protons, often with different numbers of neutrons.

What are the 30 elements?

Atomic NumberSymbolName30ZnZinc31GaGallium32GeGermanium33AsArsenic

What is the 54th element?

Xenon – Element information, properties and uses | Periodic Table.

Is there an element M?

Name chemical elementSymbolAtomic numberMagnesiumMg12ManganeseMn25MeitneriumMt109MendeleviumMd101

Is SA a metal?

TypeCompanyFounded1919FounderWolfe BarnettHeadquartersSouth Africa

Are elements 89 103 Metals?

The actinides are elements 89 to 103 and fill their 5f sublevel progressively. Actinides are typical metals and have properties of both the d-block and the f-block elements, but they are also radioactive.

Which is actinide element among the following?

Actinoid elements are actinium, thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium and lawrencium .

What is the last element of lanthanide series?

So from this we come to know that lutetium is the last element of lanthanide series.

Which of the following is not an atom Noid?

Photon is not a part of an atom. They are the subatomic particles with no substructure.

What is the charge of the nucleus of element 89 quizlet?

What is the charge of the nucleus of Element 89? Because it is the nucleus only this element has a charge of positive 89.

How did Rutherford discover the nucleus?

In 1911, Rutherford, Marsden and Geiger discovered the dense atomic nucleus by bombarding a thin gold sheet with the alpha particles emitted by radium. … From this observation, they concluded that almost all the atomic matter was concentrated in a tiny volume situated at the atome center, the atomic nucleus.

How many electron shells does cesium have?

Classification:Cesium is an alkali metalProtons:55Neutrons in most abundant isotope:78Electron shells:2,8,18,18,8,1Electron configuration:[Xe] 6s1

Is yttrium a reactivity?

Yttrium is a highly crystalline iron-gray, rare-earth metal. Yttrium is fairly stable in air, because it is proteced by the formation by the formation of a stable oxide film on its surface, but oxidizes readily when heated. It reacts with water decomposing it to release hydrogen gas, and it reacts with mineral acids.

Why is yttrium named yttrium?

Origin of the name Yttrium is named after Ytterby, Sweden.

Where is ytterbium found?

Ytterbium is found with other rare-earth elements in several rare minerals. It is most often recovered commercially from monazite sand (0.03% ytterbium). The element is also found in euxenite and xenotime. The main mining areas are China, the United States, Brazil, India, Sri Lanka, and Australia.

Is atomic mass a mass number?

Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element’s isotopes. The mass number is a count of the total number of protons and neutrons in an atom’s nucleus.