百度试题 题目What is the atomic number of oxygen?A、2B、6C、8D、20Answer:C 科目四考试网___科目四考试题库相关知识点: 试题来源: 解析 http://www.km4ks.com/st/tk/ 反馈 收藏
Noun1.atomic number 8- a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust O,oxygen chemical element,element- any of the more than 100 known su...
【题目】Theatomicweightofoxygenis___than___ofthehydrogen. A.15timesheavier;that B.15timesheavier:those C.16timesasheavier;that D.16timesasheavy;those 试题答案 在线课程 【答案】A 【解析】 试题分析:考查倍数表达法。句意:氧原子是氢原子重量的16倍。is16timeshavier是倍数表达法,that代指weight,可知...
Oxygen is the element with atomic number 8 and element symbol O. Under ordinary conditions, it can exist as a pure element in the form of oxygen gas (O2) and also ozone (O3). Here is a collection of facts about this essential element. Oxygen Basic Facts Atomic Number:8 Symbol:O Atomic...
What is the atomic number of an element with 8 protons, 9 neutrons, and 8 electrons? What is the atomic number of an element with 6 protons, 7 neutrons, and 6 electrons? A. 7 B. 13 C. 6 D. 12 What is the atomic number of an element with 6 protons, 7 neutrons and 6 electrons...
Atomic & Mass Number | Overview & Difference from Chapter 2 / Lesson 1 431K What is atomic number, mass number and atomic mass? Learn what atomic number, mass number and atomic mass represent. See the concept mass number vs atomic mass. Related...
The mass number of an atom is the total number of protons and neutrons contained within the nucleus of the atom. The number of protons determines the element and will always equal the atomic number of that element. The number of neutrons can change and will determine which isotope of that ...
What is the origin of the oxygen we breathe, the hydrogen and oxygen (in form of water H2O) in rivers and oceans, the carbon in all organic compounds, the silicon in electronic hardware, the calcium in our bones, the iron in steel, silver and gold in jewels, the rare earths utilized,...
The excitation of atomic oxygen to the O(1S) level by energy transfer from N 2 ( A 3 ∑ u + ) molecules in auroradoi:10.1016/0032-0633(73)90103-7The part that the energy transfer reaction N2(A3∑u+) + O(3P) → N2(X1∑g+) + O(1S) plays in the excitation of the auroral ...
Find the ratio of the number of atoms present in 16 g of O_2 and 32 g of O_3. View Solution A Find number of oxygen atoms present in 100 mg of CaCO_3. (Atomic mass of Ca = 40 u, C = 12 u, O = 16 u) View Solution ...