P1 Volumetric Analysis Easy

P1 - Volumetric Analysis Made Easy

The periodic table is split into 8 different categories. Group 1 consists of alkali metals which are very reactive. However group 7 contains very reactive non-metals. The periodic table starts from alkali and ends at noble gases (Group 8). Sodium (Na) and Potassium (K) are examples of alkali metals. Helium (He) and Krypton (Kr) are examples of noble gases. The elements that fall under the same groups have similar chemical properties. Atoms of the elements in group 1 all have one electron in their most occupied energy level also known as the outer shell. In group 1, as you go down the list, the elements get more reactive due to the fact that the outer electron is far away from the nucleus. As you go down the

Periodicity also refers to the recurring patterns that are seen in the element properties. Dmitri Ivanovich Mendeleev arranged the elements in order of increasing mass. Based on the properties that were displayed by the known elements, Mendeleev was able to take an estimate of where the missing places were in his table. These were also elements yet to be discovered.

In the periodic table, each element has its own atomic mass and number. Atomic mass is the total amount of protons and neutrons in an element, atomic mass is usually larger than the atomic number. Atomic number means how many protons the element contains. All atoms of a particular element have the same atomic

The bond is usually between a metal and a non-metal element. Atoms in a covalent bond are held together by electrostatic forces of attraction between a positively charged nuclei and negatively charged shared electrons. Every atom has a different structure or shape. The shape of an atom can change depending on the number electrons. A tetrahedral atom is in a pyramidal structure. This is because of the lone and bonded pairs of electrons. The lone pairs push the bonded pairs away, this is why they