1 (a)Chemists recognise that atoms are made of three types of particle.Complete the following table with their names and properties.name of particle relative mass relative charge+11/18363(b)Most elements exist naturally as a mixture of isotopes, each with their own relative isotopic mass. The ...
ofAtomsBasicpropertiesofatoms:1.Atomsarestable.2.Atomscombinewitheachother.AtomsArePutTogetherSystematicallyThenumbersofelementsinthesixperiodsare:2,8,8,18,18,32.ResultsofMassSpectrometryInatomicphysics,massspectrometersareprimarilyofinterestasinstrumentsforanalysingtheisotopiccompositionofchemicalelements.Anelement...
Atoms are the fundamental constituents of all elements found in the periodic table. Each element consists of a unique type of atom, characterized by its atomic number. For example, hydrogen atoms form the element hydrogen (H), oxygen atoms make up oxygen (O), and so on. Elements can exist...
If you know where a certain element sits in the table, and you know a little bit about the properties of the elements above, below, and either side, you can often figure out what the properties of that element will be.How do atoms make molecules and compounds? Atoms are a bit like ...
Every shell is complete, each orbital is filled with the right number of electrons, and as a result, noble elements are very stable. There is no chance of another molecule interacting with them, as they don’t have anything to offer. Imagine you are a tightrope walker and have a cane in...
Figure 6. This version of the periodic table shows the outer-shell electron configuration of each element. Note that down each group, the configuration is often similar. When we come to the next element in the periodic table, the alkali metal potassium (atomic number 19), we...
answer. the elements are made up of atoms with fixed masses, and the number and type of atoms in each element in a given compound are fixed. q8. answer the following- a) name the element used as a standard for atomic mass scale. b) which particular atom of the above element is used...
Atoms of each element contain a characteristic number of protons. ... The atomicmass of a single atom is simply its total massand is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu....
The total number of protons and neutrons (the mass number, A) within the nucleus determines the stability of atom, but each element is characterized only by the number of protons (atomic number, Z) in the nucleus. The rules of quantum mechanics dictate that when an atom is in a ground ...
The number of neutrons in the nucleus, as you may have gathered from the above example, can however change, and we call atoms of the same element with different numbers of neutrons "isotopes". Sometimes these isotopes are stable, but often they are not and eventually decay. Discovery of ...