The element classification is determined by the number of protons and will be the same number for every isotope of the element. However, the number of neutrons changes from isotope to isotope. The mass number, often listed after the name of the element to identify the isotope, is a total c...
a我和他都不满意这部作品 I and his all unsatisfied this work[translate] aaddressees destinatari[translate] a阿静 Arab League static[translate] aB 、telephone B、电话[translate] a我想那一定 I thought[translate] aWhat is the mass of # 什么是大量#[translate]...
2)two more than a number is -123)the sum of 1/4 and a number and is four.4)one eighth of a number is 28.5 more than 76. 相关知识点: 试题来源: 解析 【解析】what is the mass of each cube?-|||-一个立方体的容积?-|||-2)two more than a number is -12-|||-2比什么数大-...
Mass is a measure of the amount of matter in an object. What is the SI unit of mass? A. gram B. kilogram C. pound D. ounce 相关知识点: 试题来源: 解析 B。A 选项 gram 克,不是国际单位制中的基本单位;C 选项 pound 磅和 D 选项 ounce 盎司都是英制单位;B 选项 kilogram 千克是国际...
What element has 36 neutrons and a mass number of 65? How many protons and electrons does it have if it has a charge of +1? What is the mass number of an atom that contains 23 protons, 23 electrons, and 28 neutrons? What is the mass number, the n...
百度试题 结果1 题目6. What is the mass of the bananas?100g f50 g10 g-上The mass of the bananas is 160g. 相关知识点: 试题来源: 解析 160100g+50g+10g=160g 反馈 收藏
百度试题 结果1 题目27. The mass of each is 100g.What is the mass of the packet of cheese?∴Cheese8 相关知识点: 试题来源: 解析 8 反馈 收藏
What is the mass of(a)6x10^23 atoms of O(b)6x10^23 atoms of O2(c)one mole of carbon dioxide,CO2(d)two mole of silver,Ag(e)0.2 moles of silver,Ag 相关知识点: 试题来源: 解析 a)6x10^23即是1mol,即1mol原子的氧元素.质量为16*1=16gb)1mol氧原子的氧气质量为 16*1=16gc)...
The molar mass of a substance is the mass of one mole of that substance. What is the unit of molar mass? A. g/mol B. mol/g C. L/mol D. mol/L 相关知识点: 试题来源: 解析 A。本题考查摩尔质量的单位。摩尔质量是指单位物质的量的物质所具有的质量,单位是克每摩尔(g/mol)。选项 B...
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 ...