4. In the nuclear chart, every square represents an isotope and those in the same horizontal line correspond to an element with given number of protons, Z. Therefore, the different squares along a line are various isotopes of the same element that have different number of neutrons, N. The ...
B. Cunningham in the fall of 1945. Many radioactive isotopes of americium have been isolated and identified, having mass numbers that range from 237 through 247. The longest-lived americium isotope has mass number 243 and a half-life of 7,380 years. The ground state (outer orbital) ...
Nuclei such as 14 N and 14 C, which have the same mass number, are isobars. Nuclides are designated by a shorthand notation in which one writes , that is, for a nucleus with 6 protons and 8 neutrons, one writes , or, , or just 14 C. The size of a nucleus is approximately 1...
And discovered that the elements having similar properties repeat after regular intervals. Why atomic number and not atomic mass? Atomic mass is the total mass of the protons and neutrons present in a nucleus of an atom. Whereas, the atomic number is the number of protons in a nucleus. ...
unit; the loss of an alpha particle, or helium nucleus (two protons and two neutrons), decreases the atomic number by two units; and the process of electron capture, in which an electron from an inner shell is drawn into the nucleus, corresponds to a decrease of atomic number by one ...
of an atom is determined by its electron number and the stable orbitals available to it. An atom such asfluorine, with seven electrons in its outer shell, cancombinewith a similar atom by sharing a pair of electrons with it; each atom thus achieves thenoble-gas configurationby having three...
atomic mass c. atomic number d. neutronsHow do you find the number of valence electrons of an element?1. How many elements are on the periodic table? 2. Which of those are: a. metal? b. gas? c. unknown?What are the representative elements? In what region(s) of the p...
On the same unit on chemical elements, a student choose to create a Scratch game on the element Bismuth called Billy’s Bismuth Bellyache, where answering questions about bismuth correctly led to the gradual building of a bismuth subsalicylate molecule (the active ingredient in Pepto-Bismol). She...
Answer to: Atoms of the same element that have different numbers of neutrons are called ___. A. isotopes B. ions C. isomers D. inert elements By...
Different versions of the same element, called isotopes, can have a different number of neutrons. Elements can also gain or lose electrons to become charged, in which case they are called ions. Atomic symbol: The atomic symbol (or element symbol) is an abbreviation chosen to represent an ...