1.(Elements & Compounds) any of the 118 known substances (of which 93 occur naturally) that consist of atoms with the same number of protons in their nuclei. Comparecompound11 2.one of the fundamental or irreducible components making up a whole ...
MALE STUDENT: 43 protons?MALE PROFESSOR: That’s right. But they named it technetium to emphasize that it was artificially created — with technology. And people thought that synthesizing this element, making it artificially, was the only way to get it. We still hadn’t found it occurring ...
Oxygen is achemical element with an atomic number of 8(it has eight protons in its nucleus). Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures. ... About 21% of Earth's atmosphere is oxygen. ...
Although all atoms of an element have the same number of protons in their nuclei, they may not all have the same number of neutrons. Atoms of an element with the same mass number make up an isotope of the element. All known elements have isotopes; some have more than others. Hydrogen,...
MALE STUDENT: 43 protons? MALE PROFESSOR: That’s right. But they named it technetium to emphasize that it was artificially created — with technology.And people thought that synthesizing this element, making it artificially, was the only way to get it.We still hadn’t found it occurring in...
We present a simple method for the quantitative analysis of light elements, H, C, N and O, in thin, self-supporting low Z films with MeV protons in one run. Proton-proton scattering is utilized for the detection of hydrogen and backscattered protons are simultaneously analyzed for detecting ...
sodium just has K L and M shells (2 8 1) while calcium has K L M and N (2 8 8 2). 2008-01-18 16:30:26 补充： The nuclear charge of Ca must be greater than Na due to 20 protons attract 2粒 outermost shell electrons paring Na with 11protons ...
reaction that produces the huge amounts of energy radiated by the Sun and most other stars is the fusion of the lightest element, hydrogen, its nucleus having a single proton, into helium, the second lightest and second most abundant, with a nucleus consisting of two protons and two neutrons...
High-energy protons interact with the nucleus of an atom in the same way as neutrons would (via strong interaction). Low-energy protons behave differently and have a much higher probability of interacting with electrons (via Coulomb interaction). Proton beams may, however, produce less accurate ...
ISOTOPE ATOMS OF THE SAME ELEMENT WITH THE SAME NUMBER OF PROTONS/ELECTRONS BUT A DIFFERENT # OF NEUTRONS CARBON ISOTOPE HOW MANY PROTONS, ELECTRONS AND NEUTRONS HOW MANY PROTONS, ELECTRONS NEUTRONS COMPARE THE TWO CARBONS 1. HOW DOES THE MASS COMPARE ...