What is the atomic number for calcium? A、20 B、8 C、16 D、89 Answer:A 相关知识点: 试题来源: 解析 A 钙(Calcium)的化学符号是Ca,其原子数为20。分析选项:- **A、20**:正确,钙的原子序数即为20。- **B、8**:错误,8是氧(O)的原子序数。- **C、16**:错误,16是硫(S)的原子序数。...
What is the atomic number for zinc? A、14 B、18 C、26 D、30 Answer:D 相关知识点: 试题来源: 解析 D 分析各选项对应的原子序数: - **A、14**:对应元素为硅(Si),而非锌(Zn)。 - **B、18**:对应元素为氩(Ar),属于稀有气体。 - **C、26**:对应元素为铁(Fe),位于第四周期过渡金属...
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 to this QuestionWhat are the symbol, atomic number, and mass number of an atom with 15 protons, 1...
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?Question:What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?Atomic Number and Mass Number:The atomic number of an atom determines what element ...
What is the atomic number of the element which is just below the above element in the periodic table ? View Solution Knowledge Check The electronic configuration of an element is 1s22s22p63s23p3. What is the atomic number of the element which is just below the above element in the ...
It is the number of an element in thePeriodic table of the elements.结果一 题目 What is the atomic number of an element?ps:Please answered in English 答案 译文,什么是元素的原子序数?It is the number of an element in thePeriodic table of the elements.相关推荐 1What is the atomic number ...
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
number of protons in the nucleus of each atom. What is the atomic number of this helium atom? A neutral atom must have equal numbers of protons and electrons, so the atomic number of an element also gives the number of electrons.
What is the atomic mass of Sodium?(a). 22 g/mol(b). 23 g/mol(c). 11 g/mol(d). 20 g/mol- Hint: Atomic mass of an element can be determined from knowing the atomic number of the element and the number of neutrons present. In case of sodium ...
Because protons are units of matter, atomic numbers are always whole numbers. At present, they range from 1 (the atomic number of hydrogen) to 118 (the number of the heaviest known element). As more elements are discovered, the maximum number will go higher. Theoretically, there is no maxi...