Answer:
khi sôi nhiệt độ của nước đạt 100oC, đến lúc này một phần nước sôi sẽ biến thành hơi nước, hơi nước sẽ đùn lên phá vỡ mặt nước và bốc hơi vào không khí, hình thành lên hiện tượng sôi của nước. Nước sôi đánh dấu mốc chuyển đổi trạng thái từ nước (thể lỏng) sang hơi nước (thể khí).
Explanation:
Answer:
Atoms bind because, being united, they acquire a more stable situation than when they were separated and this allows them to exist in nature. This situation of greater stability usually occurs when the number of electrons that possess the atoms in their last level is equal to eight, structure that coincides with that of the noble gases.
Quemical bonding refers to the attraction forces that keep bonded the atoms in compounds, and there are two main types of chemical bonding: ionic and covalent bonding.
Explanation:
1)<u> Ionic bond:</u> results of the electrostatic interaction between ions, that results in the net transfer of one or more electrons from one atoms or group of atoms to other atom.
<em><u>Example of ionic bond:</u></em>
Sodium Chloride Na-Cl +, Sodium ion has a positive charge and chlorine ion has a negative charge, so chlorine seats an electron to sodium creating a ionic bond.
2)<u> Covalent bond:</u> In this type of chemical bond two atoms shares one or more pairs of electrons.
<em><u>Example of covalent bond</u></em>
Carbon monoxide is an example of a compound that has covalent bond, one carbon atom and one oxygen atom, linked by a triple bond that consists of two covalent bonds as well as one dative covalent bond.
<span>The correct answer should be two oxygen atoms. That's because it's properties are similar to carbon insofar that it can form four bonds, so if it forms bonds with 2 oxygen atoms then it will have all four bonds created since Oxygen forms double bonds. This would make SiO2 which is also known worldwide as silica.</span>