Atomic Mass

Germanium

it started scientific thought about the structure of the atom

Atomic mass does not directly indicate an element's reactivity. Reactivity is primarily determined by the number of electrons in the outer shell of an element (valence electrons). Elements with a full or nearly full outer shell (noble gases) are generally unreactive, while elements with few electrons in the outer shell (alkali metals) are highly reactive.

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relationship between the number of sides of afigure and the number of vertices

For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.

The atomic mass of strontium is 87.62.

The Atomic Mass is, basically, the sum of the protons (the "atomic number"), and the number of neutrons.

average atomic massof an element=(Atomic mass of first isotope X % of that isotope) + (Atomic mass of second isotope X % of the second isotope)

107.8682

The atomic mass of francium is approximately 223. It is a highly radioactive element and the heaviest known alkali metal.

The Atomic massis 58.6934

No element in period 3 has an atomic mass of 12.

The atomic mass of phosphorous-31 is 30,97376163(20).

An atomic clock is a reference clock whose operation is based on an atomic process, such as the frequency of electromagnetic radiation associated with a specific energy-level transition in an element such as caesium.

Calcium has atomic number of 20, an atomic weight of 40.078 and an mass numbers of 40 - 48 inclusive in its isotopes. Atomic number is the count of protons in the nucleus. Mass number is the count of protons plus neutrons.

The question refers to atomic mass rather than atomic weight.

Atomic mass normally refers to the mass of a specific isotope of an element and is related to the mass number. Atomic weight ( or relative atomic mass as it is termed by IUPAC) the average mass of naturally occurring isotopes of an element.

The relationship between mass number and atomic mass is defined in terms of the Atomic mass unit which is in simple terms 1/12 of the mass of a 12C atom.

If you need to find out more about the relationship between mass number and and atomic mass you need to read the article "atomic mass unit" in wikipedia.

yes. it is.

There are some elements that would get placed in an order that would not be correct for their electronic configuration.

These informations add knowledge about the chemical composition of a molecule and the molar mass.

No. They have different masses, but the same atomic number. Carbon-12 has a mass number of 12 and atomic number of 6, and carbon-14 has a mass number of 14 and atomic number of 6. The difference in mass number is due to different numbers of neutrons. Carbon-12 atoms have 6 neutrons and carbon-14 atoms have 8 neutrons.

Strontium is a metal element. Atomic mass of it is 87.62.

The space is referred to as a shell. Within the shell there is the subshell (orbit) and then there is the orbital (the orientation in 3D space)

The isotope carbon-12 can be represented as 12C where the '12' is written in superscript. If you want to just represent carbon not as a isotope but as an element, you can just write its chemical symbol C. Carbon-12 has 6 protons, 6 electrons and 6 neutrons.