Q21. An isotope of an element, atomic number z, has mass number 2z + 4. How many neutrons are in the nucleus of the element?A z+ 4B z+ 2C zD 4Q22. The nucleus of a 23 11Na atom containsA 11 protons and 12 neutrons.B 11 protons and 12 electrons....
- 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)...
What is the average atomic mass of Element X if 51.83% of Element X occurring in nature has a mass of 106.905 amu and 48.17% of the atoms have a mass of 108.905 amu? How is average atomic mass calculated? How many neutrons, protons, and el...
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To be an element, a substance has to at least have protons, since these particles define the type of element. Elements consist of atoms, which contain a nucleus of protons and neutrons surrounded by a cloud or shell of electrons. Elements are considered the basic building blocks of matter be...
What element has the atomic number 1?Components Of Matter:Elements are the substances that make up all matter in the universe. Each element has a unique atomic number, which represents the number of protons inside the nucleus of one atom of that element. Protons are the positively charged ...
13. How many electrons does $N{{a}^{+}}$ has in its outermost shell? 10 11 18 8 Ans:(d) 8 14. Atomic number of an element during a Chemical reaction. Increases Remain Constant Decreases May be (a) or (c) Ans:(b) Remain constant ...
SymbolPuA silvery, radioactive metallic element of the actinide series that has the highest atomic number of all naturally occurring elements. It can be found in minute amounts in uranium ores and is produced artificially by bombarding uranium with neutrons. It is absorbed by bone marrow and is...
The periodic table entry for each element has information on the total number of electrons, protons and neutrons it contains. The atomic number is equal to the number of protons and electrons for an uncharged atom. The mass number minus the atomic number
element vs. compound Anelementis a substance that cannot be separated into simpler substances by chemical means. An element consists of anatomwith a unique combination ofprotons,neutrons, andelectrons. For example, the element hydrogen has one proton, one neutron, and one electron. We cannot use...