Question

Fill in the blanks about chemical elements of robot LED display materials. Chemical element fill-in-the-blank questions about the "Haibao" robot covered with LED display screens

The "Haibao" robot is covered with LED display screens. LCD electronic products use LED technology. LED is a light-emitting diode, a solid-state semiconductor device that converts ___ energy into ___ energy when it emits light. The symbol of the metal gallium element is Ga, which is widely used in the manufacture of semiconductor materials. The atomic structure diagram of the gallium element is shown in the figure below.

1) The number of protons of the gallium element X=____, and the number of electrons in the outermost layer of its atom is _______;

(2) It is known that the common valence of metal gallium is +3, so the chemical formula of the oxide of the gallium element is _____.

(3) Gallium hydroxide and sodium hydroxide both have similar properties as alkalis, so the chemical equation for the neutralization reaction of gallium hydroxide and dilute sulfuric acid is _____________.

Answer 1

Answer: electricity, light, 31, 3, Ga2O3, 2Ga(OH)3 ＋3H2SO4＝Ga2(SO4)3 ＋3H2O.

Answer analysis: The "Haibao" robot is covered with LED displays. LCD electronic products use LED technology. LED is a light-emitting diode, a solid-state semiconductor device that converts electrical energy into light energy when it emits light.

(1) The number of protons of the gallium element = the number of electrons outside the nucleus, X=2+8+18+3=31, and the number of electrons in the outermost layer of its atom is 3;

(2) The common valence of metallic gallium is +3, so the oxygen element in the oxide of gallium is -2, and the chemical formula of the oxide is Ga2O3.

(3) Gallium hydroxide and sodium hydroxide both have similar properties as alkalis, so the chemical equation for the neutralization reaction of gallium hydroxide with dilute sulfuric acid to produce gallium sulfate and water is: 2Ga(OH)3 ＋3H2SO4＝Ga2(SO4)3 ＋3H2O.