Step 1:Find the number of protons in an atomic ion. The number of protons is equal to the atomic number of the element. The atomic number of potassium (K) is 19. Therefore, the number of protons is 19. Step 2:Find the number of electrons in an atomic ion ...
proton- a stable particle with positive charge equal to the negative charge of an electron hydrogen ion- a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus nucleon- a constituent (proton or neutron) of an atomic nucleus ...
A. The number of protons B. The number of neutrons C. The number of electrons D. The sum of protons and neutrons 相关知识点: 试题来源: 解析 A。原子序数由质子数决定。选项 A 正确,原子序数等于质子数。选项 B 中子数不能决定原子序数。选项 C 电子数在原子呈电中性时等于质子数,但不是决定原...
The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
Atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and neutrons), determines chemical behavior. 是原子序数(原子核中质子的数量)而不是原子的质量决定化学特性。 全句 We now know that atomic number (the number of protons in the nucleus), not...
T HE ELEMENT S AND T HE PERIODIC T ABLET he number of protons in the nucleus of anatom is referred to as the atomic number, orproton number, Z. T he number of electrons inan electrically neutral atom is also equal to the atomic number, Z. T he total mass of an atom is determined...
equal to the atomic number unless Are also equal to the atomic number unless the atom is an ion such as a the atom is an ion such as a ––1, 1, - -2, 2, --3… 3… Example Example Helium has an atomic # of 2 and a atomic Helium has an atomic # of 2 and a atomic ...
Atomic Number The atomic number represents the number of protons in an atom's nucleus. In an uncharged atom, the number of protons is always equal to the number of electrons. For example, carbon atoms include six protons and six electrons, so carbon's atomic number is 6. ...
百度试题 结果1 题目The atomic number of an element represents the number of ___. A. protons B. neutrons C. electrons D. protons and neutrons 相关知识点: 试题来源: 解析 A。元素的原子序数代表质子数(protons)。反馈 收藏
A. the number of protons in an atom B. the number of neutrons in an atom C. the number of electrons in an atom D. the total number of particles in an atom 相关知识点: 试题来源: 解析 A。元素的原子序数告诉我们一个原子中的质子数。原子序数等于质子数,选项 B 中子数不能由原子序数确...