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
Which chemical element has the symbol F? What is the chemical element tin? What is an isotope symbol? What are the physical properties of gold? What is the number of neutrons in gold? What is silver on the periodic table? What chemical element is Cd?
What is the number of neutrons in sulfur? What chemical element is in opal? What chemical element is cinnabar derived from? Which chemical element has the symbol Ag? Which chemical element has the symbol B? What will most likely occur if sulfur forms an ionic bond with another element?
An atom has an atomic number of 8 and a mass number of 17. How many protons, neutrons, and electrons does it have? What are isotopes and how do they relate to atomic number and mass number? Why is the average atomic mass for an element typically not a whole number?
Atoms: Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements. Answer and Explanation: An atom that has more protons than electrons is called a ...
Could another type of atom just happen to have 11 protons, 11 electrons and 12 neutrons ? No. The number of protons = the 'Atomic Number', which is sometimes referred to as 'Z', defines the type of atom, i.e. which element it is an atom of. ...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
Elements with short half lives exist because each element has stable isotopes, and the decay os isotopes create more isotopes as well.
neutrons, it remains the same element but becomes an isotope of that element. Different isotopes are identified by appending M to the upper left corner of the abbreviation for that element. For example,14C is an isotope of carbon (Z = 6) that has eight neutrons rather than the usual six....
When the stated mass number of an element is not a whole number that doesnotmean that there are parts of protons or neutrons present in the atom. It means that that mass number has been calculated to take into consideration theproportions of the different isotopes of that element believed to...