periodic table

• The periodic table of the elements consists of 92 naturally occurring elements, which are arranged in order of atomic mass.
• Three quarters of the elements are metals.
• The elements are put in groups because each group has elements with similar properties.
• The numbers on the periodic table refer to the relative atomic mass and the atomic number.
• Group one on the periodic table includes elements such as hydrogen, lithium, and sodium.
• Group two on the periodic table includes elements such as beryllium, boron, and fluorine.
• Group seven on the periodic table includes elements such as gold, silver, and platinum.
• Group zero on the periodic table includes elements such as radon, polonium, and ununseptium.
• The transition metals are located in a block in the middle of the periodic table.
• Period two and period three on the periodic table are the important ones as far as we're concerned.
• The first 20 elements on the periodic table are the most useful to learn.
• The s block, d block, p block, and f block on the periodic table are all related to subshells and electrons.
• The ionization energy is the energy needed to take away an electron.
• For lithium, sodium, potassium, the first ionization energy is small.
• An atom with a high electron affinity, such as fluorine, will gain an electron with high energy.
• Period three elements have smaller ionization energies than period two because they have another shell, making the electrons further away from the nucleus and the attractive force weaker, making it easier to remove them.
• The first ionization energy is the energy needed to remove the first electron.
• A neutral atom given an electron releases energy, indicating its likelihood to gain an electron.
• Electron affinity is the energy released when an atom gains an electron.
• Group seven elements, such as fluorine, chlorine, bromine, and iodine, have the highest electron affinity because they want to gain an electron and release the most energy if they do.
• For helium, neon, argon, the first ionization energy is very big.
• As we move from left to right across a period, the ionization energy gets bigger because there are more protons in the nucleus, making it harder to remove an electron.
• The first ionization energy is the minimum energy needed to remove an electron from an atom.
• Atoms which only have one electron in their outer shell have a small ionization energy.
• Atoms which have a full outer shell have a large ionization energy.