百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
The first electron affinity of an element describes the energy which is released when one mole of gaseous atoms of the element accepts one mole of electrons. It is an important quantity when predicting reactivity of non-metals.Answer and Explanation: ...
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. The number of protons determines the element of the atom, while the number of neutrons can vary. Electrons exist in energy levels or shells around the nucleus. 开学特惠 开通会员专享超值优惠 助力考试高...
b. the number of neutrons in the nucleus of the atom. c. the number of electrons in the outer or Which of the following are formed elements: white blood cells, red blood cells, and/or platelets? From this neutral state, if th...
- The element uranium having the atomic number Z = 92 have been irradiated with many slow neutrons and many new radioactive elements up to Z = 112 and earlier it has been named as ununbium but now its names have been discovered and is now as Copernicium (Cn)...
摘要: The holder has carrier (2) which has a medium for detachable attachment of the licking stone ring differing from the cross-sectional shape of the carrier. A rod-shaped protrusion (4) protrudes from a base (3) of the carrier for intervention in a recess of the licking stone.收藏...
Write the symbol for the nuclide with 47 protons and 61 neutrons and identify the element. Consider the ion Boron^{4+} (Z = 5, one electron, 5 protons, and 6 neutrons) in the context of the Bohr model. If the electron bound to Boron^{4+} is initiall...
What element has 1 proton, 0 neutrons, and 0 electrons? What is its mass number? What is its charge? What is the relative mass of an electron and a proton? The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass...
\text{Element Symbol} \quad _{Z}^{A} \) - Where: - \( A \) = Mass number (number of protons + number of neutrons) - \( Z \) = Atomic number (number of protons) 2. Analyzing Each Option: - (i) .7935Br: - Here, \( Z = 35 \) (atomic number of Bromine) and \( A...
An element that has the electron configuration (Ne)3s2 is in the group: a. 2. b. 5. Write out the electron configuration for the ground state of the phosphorus atom, for which Z = 15. What is the electron configuration of atom in the ground state? a) Write out t...