Because an atom’s mass depends mainly on the number of protons and neutrons it contains, and because protons and neutrons have masses close to 1 amu, you might expect the atomic mass of an element to always be nearly a whole number. 原子的质量主要取决于质子数和中子数,质子与中子的质量都...
A cell with an especially good FIT is like an extra-strong link in the chain, it is probably a waste of resources since it is the weakest links that determine the strength of the chain just as it is the cells with the poorest FIT scores that it makes sense to focus on improving to...
Argon is an element, abbreviated 'Ar' on the Periodic Table of Elements. An element is a substance that can't be further broken down into other elements. Answer and Explanation: There are 22 neutrons in one atom of argon. On the periodic table, argon's atomic number is 18. This tells...
Determine the mass number of a beryllium atom with 5 neutrons. How does one isotope differ from another? How to calculate protons, neutrons and electrons How is the atomic weight of an element determined? Which of among the atomic number, mass number and isotopes distinguishes one element from...
How is the number of neutrons in the nucleus of an atom calculated? Determine the electron to baryon ratio in the universe, noting any assumptions. What quantity would be used to measure the amount of work a single electron can do?
Understanding ionization energy is important because it reflects an element's ability to participate in some chemical reactions or form some compounds. If you must determine which element from a list has the highest ionization energy, find the elements' placements on the periodic table. Remember that...
10 (a)State the nature of an α-particle.••■.[1](b)Describe how an electric field between two charged plates could be used to determine whether a beam of particles consists of α- or β-particles.[2](c)Describe the path of y-rays in a magnetic field.■.[1](d)State what ...
Each12C atom has six protons and six neutrons in its nucleus, adding up to an atomic mass of 12 AMU.Electronshave a low mass, so they are assumed to have a negligible effect. Consequently, the nucleus accounts for almost the entire mass of the atom of any element, which means that a ...
The identity of an element is based upon the number of protons found in the nucleus. Step 2 Determine the number of electrons using the atomic number. An atom has a neutral charge, so the positive and negative charges are equal to each other. The atomic number is also the number of ...
Atoms are characterized by their tiny size (about 1 x 10^-10 m across) and their inclusion of protons, electrons and (except in the case of hydrogen) neutrons. Atomic radii are a function of both atomic number and element period, with radii increasing fr