Gallium (Ga) is a silver metal that has the atomic number 31 in the periodic table. It is located in Group 13 of the periodic table. It has the symbol Ga. Our gallium page has over 250 facts that span 102 different quantities. Each entry has a full citation identifying its source. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Gallium is not a biologically significant element. It is a non-toxic element. Gallium is also a non-radioactive metal. Isotopes of Gallium. There are thirty-one isotopes of gallium and their atomic mass range from 56 to 86. The stable isotopes are only two, gallium-69 and gallium-71. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium.

• Atomic Number Of Gallium
• Atomic Number Of Indium
• Atomic Number Of Gallium

How would you give the nuclear symbol for the isotope of gallium, Ga, that contains 40 neutrons per atom?

1 Answer

Explanation:

In order to write the nuclear symbol of an isotope #'X'#, you need to know two things

• its atomic number - the number of protons it has in its nucleus
• its mass number - the numbe of protons and neutrons it has in its nucleus

In your case, you have to determine what the nuclear symbol will be for an isotope of gallium that contains #40#neutrons in its nucleus.

Atomic Number Of Gallium

The first thing to do here is take a look at a periodic table and make a note of gallium's atomic number.

Gallium is located in period 4, group 13 of the periodic table, and has an atomic number equal to #31#.

Since this isotope also has #40# neutrons in its nucleus, it follows that its mass number will be Foscam mac download.

Atomic Number Of Indium

Mini mac velvet teddy. #color(blue)('mass number' = A = 'no. of protons' + 'no. of neutrons')#

#A = 31 + 40 = 71#

Now, nuclear symbol notation must follow these rules

In your case, #A = 71# and #Z = 31#, so you have

#'_31^71'Ga' ->#gallium-71

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Gallium

Chemical Formula: Ga
Atomic Number: 31
Atomic Weight: 69.723
Category: Post-transition metal
CAS Number: 7440-55-3

Atomic Number Of Gallium

Melting Point 29.76 °C
Density: 5.91 g/cm³
Mohs Hardness: 1.5
Crystal Structure: Orthorhombic
Thermal Conductivity: 40.6 W/(m·K)

Naturally occurring in bauxite ore, gallium metal can be extracted from the spent liquor at aluminum refineries. About 300 to 400 metric tonnes of the metal is refined every year, with China accounting for about three-quarters of this total. Gallium is alloyed with arsenide and nitride for the production of integrated circuits, or converted to trimethyl gallium for the production of light emitting diodes (LEDs). While gallium prices soared in 2010 and 2011, in recent years new sources of the metal have returned prices closer to their long-term average.

SMI Ltd. is a gallium metal supplier in quantities from 100g to over 1000kgs. We also have stock of high purity gallium and gallium trioxide (Ga₂O₃). Please feel free to contact us to purchase gallium metal or for a gallium price.

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Gallium is a lustrous silver metal that melts at just 29ºC (84ºF). Naturally occurring in bauxite ore, gallium is primarily extracted as a by-product aluminum smelting. More than half of all gallium is used in the production of..