Element Gallium (Ga), Group 13, Atomic Number 31, p-block, Mass 69.723. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. General Atomics is a visionary pioneer with a unique and powerful mission. Join us and you can work on transformative technology, developing the latest solutions for Nuclear Fuel Cycle, Electromagnetic Systems, Remotely Piloted Aircraft Systems, Airborne Sensors, Laser Technologies, or Biofuels. Symbol: Ga Atomic Number: 31 Atomic Mass: 69.723 amu Melting Point: 29.78 °C (302.93 K, 85.604004 °F) Boiling Point: 2403.0 °C (2676.15 K, 4357.4 °F) Number of Protons/Electrons: 31 Number of Neutrons: 39 Classification: Other Metals Crystal Structure: Orthorhombic Density @ 293 K: 5.907 g/cm 3 Color: White/Silver Atomic Structure.
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
- 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
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
Since this isotope also has
Now, nuclear symbol notation must follow these rules
In your case,
Atomic Number Chart
Related questions
Gallium Element
In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). The number of protons determines how many electrons surround the nucleus, and it is the arrangement of these electrons that determines most of the chemical behavior of an element.
Ga Atomic Number 31
In a periodic table arranged in order of increasing atomic number, elements having similar chemical properties naturally line up in the same column (group). For instance, all of the elements in Group 1A are relatively soft metals, react violently with water, and form 1+ charges; all of the elements in Group 8A are unreactive, monatomic gases at room temperature, etc. In other words, there is a periodic repetition of the properties of the chemical elements with increasing mass.
Gallium Mass Number
In the original periodic table published by Dimitri Mendeleev in 1869, the elements were arranged according to increasing atomic mass— at that time, the nucleus had not yet been discovered, and there was no understanding at all of the interior structure of the atom, so atomic mass was the only guide to use. Once the structure of the nucleus was understood, it became clear that it was the atomic number that governed the properties of the elements.