1 Mass nouns always use the singular form Mass nouns don’t have plural forms, so they always use the singular form. That means you never add -s or -es to the end. If a mass noun is the subject of a sentence, the verb should also be singular to maintain subject-verb agreement. ...
百度试题 结果1 题目1 What is a possible mass number of a magnesium isotope? A 12 B 23.99 C 24 D 24.3Your answer C[1] 相关知识点: 试题来源: 解析 C 反馈 收藏
What is the mass number for beryllium? Mass Number: A mass number is a total count of all the protons and neutrons in the nucleus of an atom. Protons are the positively charged particles in the nucleus while the neutrons have a neutral charge. Each particle has a mass count of one. ...
百度试题 结果1 题目What unit is nanometer of? A. measurement B. force C. area D. mass 相关知识点: 试题来源: 解析 A.measurement 反馈 收藏
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...
①The merchants of Arab are doing their things all of the world.(n.商人) ②He is a wholesale merchant.(n.批发商) ③This is a merchant ship of 5,000 tons.(adj.海上货运的) 2.negotiate vt.商定;达成(协议) vi.谈判;...
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Mass Number: Elements are composed of only one type of atom and are the basic units of matter. Elements can be defined by several properties, one of which is their mass number. Mass number is the sum of the mass of protons and neutrons in an atom. ...
Discover why mass is important, how mass is measured, units of mass measurement, and the origins of the term mass. What Is Mass? When you go to the doctor for a checkup, the doctor will usually weigh you by having you step on a scale. But what if your doctor's office were on ...