atoms and elements 1 Pages 309 Words

All biological and abiotic substances consist of basic structures called elements. There are only 92 natural ingredients. Elements are their reasons because they can not be broken down into substances with different properties.

Elements contain small particles called atoms. Each element has only one atom. The three most stable parts of atoms are protons, neutrons, and electrons. Protons and neutrons are in the nucleus. Electrons move around atoms. Most atoms are empty

The protons and electrons are charged, the protons have positive charges, and the neutrons have negative charges. If the atom is electrically neutral, the number of protons equals the number of electrons. The whole atom is summarized by the force between the positive and negative electrons.

The periodic table of elements is a convenient list of 92 naturally occurring elements. The atomic symbols, weights and numbers of the elements are included in this chart. Create atomic symbols using one or two letters of each element. The atomic number of an element is the number of protons contained in each atom of the element. The atomic weight of an element is the weight of proton and neutron of each atom. The atoms are listed according to the increase in atomic number of the periodic table. Line up according to the number of electrons in the shell

Electrons move around a nucleus at a fixed distance to form an electron shell corresponding to different energy levels. The closest electron shell to the nucleus is the smallest and can only hold two electrons. The second shell can hold up to 8 electrons. The electrons in the atom usually first fill the shell closest to the nucleus and then start entering the next nucleus.

As of November 2018, 118 chemical elements have been identified. A chemical element or element is an atomic species (that is, the same atomic number or Z) having the same number of protons in its nucleus. Hence, elements can be listed by the number of protons in the atoms of each element listed below.

An atom is defined by the number of protons and neutrons. The number of protons represents the number of atoms and determines which element is an atom. Neutron contributes to atomic stability and determines the number of isotopes. The most important stabilizing element found by humans is lead, and there is sufficient evidence that there are 82 protons. Due to the structural symmetry of the atoms, some isotopes of lead with different numbers of neutrons are stable for their "mysterious" number of protons. Normally, atoms with many protons and neutrons become asymmetric in atomic structure, become unstable and collapse into lighter elements. However, chemists have speculated that some of these very heavy elements may have stable isotopes

Transmutation is the conversion of one chemical element or isotope to another chemical element. Because the element (or isotope) is defined by its atom, the number of protons (and neutrons) in the nucleus, transmutation occurs as the number of protons or neutrons in the nucleus changes. Natural metamorphosis of past star nuclear synthesis has created the majority of the most heavy chemical elements in the known universe and continues to date and continues to date with the most common elements of the universe, including helium, oxygen and carbon It is producing. Most stars undergo metamorphism through fusion reactions including hydrogen and helium, and larger stars can also fuse heavier elements to iron later in evolution.