百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q? B A calcium B potassium C strontium D yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
When specifying the location of valence electrons, however, just identifying the orbitals for the valence electrons suffices. We do that by writing the snippet of the valence electrons.Answer and Explanation: Indium (In) is element 49 and is a group 3 elemen...
How many valence electrons does lithium have? What element is fluorine? What is a polar covalent molecule? What is the orbital notation for lithium? Why is fluorine special in terms of electronegativity? Why is the electronegativity of an element important?
AnN-type semiconductoris one that carries current in the form of negatively-charged electrons. This is very similar to conduction of current in a wire. AP-type semiconductoris one that carries current predominantly as electron deficiencies called holes. A hole has a positive electric charge. This...
This element will form an ion with a charge of ___? Write the symbol of a cation from group 1A with 18 electrons. Which element is most likely to form an anion with a -2 charge? a. N b. Ca c. Al d. Se An Se ion has a mass number of 78 and a charge of -2. Determine ...
Silicon has total 14 electrons in its isolated atom. The first orbit consists of 2 electrons. The second orbit consists of 8 electrons and the third orbit consists of 4 electrons. As there are four electrons in the outer most orbit of a silicon atom, the silicon is a tetravalent element....
If an element has an atomic number of 6 and a mass number of 14, how many neutrons does it have? Is the mass number the number of protons? How many neutrons does darmstadtium have? What isotope has 8 protons, 8 neutrons, and 8 electrons? What is the mass number of an electron? W...
Lithium is the metal of choice for many solid-state batteries due to the element's high energy density and low binding energy. Structurally, these widely used batteries use lithium ions (Li+) in their cathode and electrolyte, while their anode is often made of graphite or silicon. Why lithiu...
has five electrons in its outer shell, most of its compounds are trivalent. it is a constituent of all living tissues. since it is a component of dna and part of a genetic code, it is an essential element of life. it is found in nitrates and nitrites in soil and water. all these ...
What element has a mass number of 65? What is darmstadtium's atomic mass? What is gram atomic mass? What is the mass number of zinc? What is the mass number of helium? What is the atomic mass of carbon-14? What is the mass number of a neutron?