1.Based on the naming rules for ions which of the following is a negatively charged ion(not a polyatomic ion)
answer: C Chloride
2.A valence electrons increases by one
3.c How many energy levels it has
4.d 1-
5.c Potassium and iodine
1. To determine which of the options is a negatively charged ion (not a polyatomic ion), we need to understand the naming rules for ions. Negatively charged ions are known as anions and typically have "-ide" as the ending. For example, chloride is the anion form of chlorine. It is formed by adding an extra electron to the chlorine atom, resulting in a negatively charged ion. Therefore, the correct answer is C. Chloride.
2. When a valence electron increases by one, it means that one additional electron has been added to the outermost shell of an atom. Valence electrons are the electrons present in the outermost energy level of an atom, which are responsible for the atom's chemical properties and its ability to form bonds. By increasing the number of valence electrons, the atom becomes more likely to form chemical bonds with other atoms to achieve a stable electron configuration.
3. To determine the number of energy levels an atom has, you can examine its position in the periodic table. Energy levels, also known as electron shells or orbitals, are represented by the rows (periods) on the periodic table. Each subsequent row corresponds to an additional energy level. For example, the first row (period 1) corresponds to the first energy level (which has only one sublevel), the second row (period 2) corresponds to the second energy level (which has two sublevels), and so on.
4. The notation "1-" represents a negatively charged ion, also known as an anion. The negative sign indicates that the ion has gained one extra electron compared to its neutral form. The number "1" indicates the charge, in this case, a single negative charge.
5. Potassium and iodine are elements. Potassium is an alkali metal with the atomic symbol K, while iodine is a halogen with the atomic symbol I. When combined, potassium and iodine can form a compound called potassium iodide (KI), which is a crystalline solid often used in chemical applications.