Electrostatic attraction: Attraction between two charged particles, e.g. nuclei and electrons
Group 1: The first group of the periodic table. Each element has 1 valence electron and is extremely reactive. Examples include lithium, sodium, potassium, caesium, francium
Lithium: Li, the least reactive group 1 element. Has two shells of electrons, 3 protons, and a relative atomic mass of 7.
Potassium: K, the third element of group 1. Has four shells of electrons, 19 protons and a relative atomic mass of 39.
Sodium: Na, the second element of group 1. Has three shells of electrons, 11 protons and a relative atomic mass of 23.
Valence electrons: Outer shell electrons.
Subscribe to:
Post Comments (Atom)
Section 3 a) Specification
3.1 explain the terms homologous series, hydrocarbon, saturated, unsaturated, general formula and isomerism. A homologous series is a grou...
-
The group 7 elements, also known as halogens, are F, fluorine, Cl, chlorine, Br, bromine, I, iodine, and At, astatine. They all have antimic... -
Metals can be placed in an order of most to least reactive, called the reactivity series. This can be remembered using an acronym: Plea... -
Particles of a substance can be present in different physical states, the states of matter. They are solid, liquid and gas, and increasing ...
No comments:
Post a Comment