Description : Which temperature does the gallium melt ? -Science
Last Answer : 29.76 °C or 85.6°F is the melting point of Gallium The Boiling Point is 4044°F (2229°C).
Description : At which temperature does the gallium melt ? -Science
Last Answer : The element gallium possesses some of the re- quisite properties for a heat-transfer liquid. It is a unique material, having a low melting point and a high boiling point. Pure gallium melts at 29.78°C, and suitable alloying will produce a metal which melts below room temperature.
Description : What is the sign of gallium ?
Last Answer : Ga Galliav's signal
Description : What is the number of electrons in gallium ?
Last Answer : The number of electrons in gallium is 31 .
Description : Is gallium a cation or anion?
Last Answer : Gallium is a metallic element. It forms cations Ga3+ and Ga+
Description : How many elements does gallium have?
Last Answer : Gallium is a chemical element. One might say it has one element.
Description : What kind of bond is gallium bromide?
Last Answer : Gallium bomide has an ionic bond.
Description : How much gallium is used a year?
Last Answer : Approx. 400 t gallium is used in a year.
Description : Which is a property that Mendeleev's predicted for gallium?
Last Answer : Examples: density, melting point, atomic weight, density and formula of oxide.
Description : Which of the following cyclotron produced radiopharmaceuticals is used for assessing regional myocardial perfusion as part of an exercise stress test? (a) Thallous chloride 201TI USP (b) Sodium iodide 123I (c) Gallium citrate 67Ga USP (d) Indium 111In pentetate (e) Cobalt 57Co cyanocobalamin
Last Answer : Ans: A
Description : Tunnel diode is a: a) Power diode b) Has light doping c) Has heavy doping d) Is a reverse recovery diode Ans: C 76.LEDs are fabricated from: a) Silicon b) Germanium c) Si or Ge d) Gallium arsenide
Last Answer : Ans: D
Description : Which of the following metals is in a liquid state at normal room temperature? (a) Sodium (b) Radium (c) Gallium (d) Silicon
Last Answer : Ans:(c)
Description : Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium
Last Answer : (2) Gallium
Description : One of the first satellite system catering personal based communications services scheduled for operation. A. Iridium system B. Plutonium system C. Indium system D. Gallium system
Last Answer : A. Iridium system
Description : What kind of battery panels are used in some advance satellites? A. Gallium Arsenide solar panel B. Germanium based panels C. Silicon based panels D. Gallium Phosphate solar panel
Last Answer : A. Gallium Arsenide solar panel
Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative
Last Answer : C. Light emitting diode
Description : __________ is a donor impurity for semi-conductors. (A) Boron (B) Antimony (C) Gallium (D) None of these
Last Answer : (B) Antimony
Description : What is/are oxidation states of gallium? Give its reason also.
Last Answer : Ans:+1 and +3 ,due to inert pair effect
Description : The metals with very low melting points which melts by the temperature of palm are A) Sodium and potassium B) Lead and magnesium C) Aluminium and zinc D) Gallium and caesium
Last Answer : D) Gallium and caesium
Description : The domain in a gallium-arsenide semiconductor has what type of electrical field when compared to the other regions across the body of a semiconductor?
Last Answer : A field of much greater intensity.
Description : The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?
Last Answer : Threshold.
Description : What happens to the electrons of a gallium-arsenide semiconductor when they move from the normal low-energy conduction band to the high-energy conduction band?
Last Answer : The electrons become immobile.
Description : Between silicon and gallium arsenide, which has the greatest index of refraction? ∙ A. Gallium arsenide ∙ B. Neither of silicon nor gallium arsenide ∙ C. Silicon ∙ D. They are equal
Last Answer : Gallium arsenide
Description : Which element is associated with the term "galvanized"? w) gallium x) zinc y) mercury z) nickel
Last Answer : ANSWER: X -- ZINC
Description : Mendeleev proposed the existence of an unknown element that he called eka-aluminum. The element is now called: w) magnesium x) silicon y) gallium z) germanium
Last Answer : ANSWER: C -- GALLIUM
Description : Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium
Last Answer : ANSWER: W -- GALLIUM
Description : Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium