ellatot01
1. An element is a substance that cannot be broken down into any other substance. Every element is made up of its own type of atom.
2. 118 elements
3. The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
4. Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.
5. Chart Organization. The organization of the periodic table allows you to predict the properties of the elements based on their position on the chart. Here's how it works: Elements are listed in numerical order by atomic number.
6 - 7. The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Answers & Comments
2. 118 elements
3. The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
4. Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.
5. Chart Organization. The organization of the periodic table allows you to predict the properties of the elements based on their position on the chart. Here's how it works: Elements are listed in numerical order by atomic number.
6 - 7. The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Answer:
1. Elements is a substance that is composed entirely of one type of atom.
2.There are 118 known elements
3.Periodic table shows an elements atomic number as well as how many electrons each element has in its outer shell (valence electrons)
4.(don't know what answer)
5.This way helps chemists understand and predict how any given element is likely to behave during chemical reaction