The mass number is basically a count of all of the protons AND neutrons that are in the nucleus. For example, if carbon had a mass number of 12, then it would have 6 neutrons since: Mass Number - Atomic Number = Number of Neut...
Distinguish between the atomic number and the mass number of an element. What is an isotope? Element: An element consists of a single kind of atom and cannot break into different types of components. Element is formed of atoms and contains several subparts, includin...
What are the atomic number and mass number of bromine-79? How do determine the mass number of the element U not the atomic mass? The atomic number of an atom of an element is 17 while its mass number is 35. How many neutrons does the atom have?
atomic number 5,boron,B- a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder atomic number 35,Br,bromine- a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water ...
Natural rhenium is a mixture of the stable isotope rhenium-185 (37.4 percent) and the radioactive rhenium-187 (62.6 percent, 4.1 × 1010-year half-life). Element Properties atomic number 75 atomic weight 186.2 melting point 3,180 °C (5,756 °F) boiling point 5,627 °C (10,161 °F...
An artificially produced radioactive element with atomic number 111 that has only been produced in trace amounts. Its most stable known isotope has a mass number of 280 and a half-life of 3.6 seconds. SeePeriodic Table. [After Wilhelm ConradRoentgen.] ...
and is thought to have the mass number 244. The observed mode of decay of 98244is through the emission of alpha-particles, with energy of about 7.1 Mev, which agrees with predictions. Other considerations involving the systematics of radioactivity in this region indicate that it should also be...
James, and Leon O. Morgan (1919- ), discovered a new element, which would eventually be named americium. SYMBOL Am ATOMIC NUMBER 95 ATOMIC MASS 243.0614 FAMILY Actinide Transuranium element PRONUNCIATION am-uh-REE-see-um Americium was first produced in a nuclear reactor. A nuclear...
Explain Dalton’s atomic theory How do you use the key on your periodic table to find out the number of protons, neutrons, and electrons in an element? Element Atomic # Atomic mass # of protons # of electrons # of neutrons Mg Rb Au Pb Explain how to draw the nucleus of an atom. Dr...
ATOMIC MASS 247.0703 FAMILY Actinide Transuranium element PRONUNCIATION BER-klee-um The UCB researchers fired alpha particles— helium atoms without their electrons—at ameririum atoms in their particle accelerator. The result was a new element—number 97. Berkelium was produced in an ato...