The number of neutrons is what defines the type of isotope an element it is while the number of protons identifies the type of atom it is. Helium-4, which is the most common isotope of helium has two protons and two neutrons in its nucleus. A common hydrogen atom has no neutrons ...
What is the silicon element? Is silicon a metal? Learn what type of element is silicon, silicon uses, silicon properties, and if silicon is metal or nonmetal. Related to this Question What is the mass number for silicon? What is the atomic mass of silicon?
What type of chemical element is magnesium? What is the valence electron configuration for the arsenic atom? Write the noble-gas notation for the electron configuration of Se How to write an electron configuration What is the Bohr model for magnesium?
For example, plutonium, which is one of the heaviest elements, weighs more than 200 times as much as the lightest element of hydrogen. The diameter of a plutonium atom is only approximately three times the diameter of a hydrogen atom. What Are Some Examples of Atoms? The periodic table of ...
What is the electronegativity of carbon? What is the electronegativity of helium? What is the electronegativity of sulfur? What is the electronegativity of nitrogen? What does the electronegativity of an element indicate? What is the electronegativity of oxygen?
An atom is the smallest possible amount of a chemical element—so an atom of gold is the smallest amount of gold you can possibly have. By small, I really do mean absolutely, nanoscopically tiny: a single atom is hundreds of thousands of times thinner than a human hair, so you have ...
On Earth, the most abundant element in the crust is oxygen, while the most abundant element in the entire planet is believed to be iron. In contrast, the most abundant element in the universe is hydrogen, followed by helium. Element Synthesis ...
百度试题 结果1 题目What is the second element on the periodic table of elements?A.HydrogenB.Helium 相关知识点: 试题来源: 解析 B 反馈 收藏
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The number of the element is its atomic number, which is the number of protons in each atom of that element. The element symbol is a one- or two-letter abbreviation of the element's name. Sometimes it refers to an old name. (For instance, K is for kalium.) ...