DEFINITIONS
Matter - is a general bound for the shopping mall of which all physical objects atomic number 18 made. Any substance that takes up mass and occupies space.
Particles matter is made of particles
atoms the smallest and most canonical unit of an element that can take part in a chemical reaction. on that point is one atom for each one element. Atoms be made of 3 sub-atomic particles. The first is called proton. It has a collateral charge, it is heavy and it is in the nucleus. The second is the electron, which is very light, has a ostracise charge and is outside the nucleus. The last one is a neutron, which is unbiased with no charge; it is as heavy as a proton and is in the nucleus.
Atomic public figure varies from element to element, and relates to only the number of protons.
Atomic mass This is the mass of the proton and the neutron added together.
element is a nice substance made of only one type of atom. at that place ninety-two elements, which each have different atoms. There be at least twenty-five manmade elements.
Period table There are ninety two elements. They are organized in what is called a periodic table. There are eighter families in this table. The first family is alkali metals and second is alkaline solid ground metals. The extension of congregation two is transition metals.
The seventh group is called halogen family and the last group, group eight, is noble gases or inert gases. To your leftover there are the metals and to your right there are non-metals. In between, you have the semi-metals or metalloids. The rows are periods, which are 1-7. There are symbols for each element, and they consist of a maximum of two letters. If there are two, the second letter is lower-case. After Uranium, all elements are synthetic.
To find the number of neutrons in an element, take away the atomic mass by the atomic number.
Important elements
Element| token| Atomic Number|
Hydrogen| H| 1|
atomic number 2| He| 2|
Lithium| Li| 3|...If you demand to get a full essay, order it on our website: Orderessay
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