Search results
An element is a pure substance consisting of only one type of atom which all have the same numbers of protons in their nuclei. The question of the conceptual nature of the term “element” represents a rather unique opportunity to examine the relationship that currently exists between chemists and philosophers of chemistry.
Mar 3, 2023 · Question 1. State the meaning of the term – (a) atom (b) molecule (c) radical – with a suitable example. Answer: (a) Atom: It is the smallest particle of an element, which is made up of only one kind of atoms. Atoms are built up of sub-atomic particles protons, neutrons and electrons. (b)
Plus–minus sign. The plus–minus sign, ±, is a symbol with multiple meanings: In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction. In statistics and experimental sciences, the sign commonly indicates the confidence interval or uncertainty ...
Sep 20, 2020 · Exercise – 1. Atomic Structure Class-7 Dalal Simplified ICSE Chemistry Solutions Chapter-4. Question 1. State the meaning of the term – (a) atom (b) molecule (c) radical – with a suitable example. Answer 1: Atom – The basic/smallest unit of matter which cannot be broken into more simpler particles. Molecule – The smallest particle of ...
Jun 18, 2021 · The state symbol has nothing to do with the actual and true "structure" in solution. In short forget about hydration shell. From IUPAC's recommendations " Notation for states and processes, significance of the word standard in chemical thermodynamics, and remarks on commonly tabulated forms of thermodynamic functions " Pure & Appl.Chem., Vol.54 ...
The ionic bond is the attraction between positive and negative ions in a crystal and compounds held together by ionic bonds are called ionic compounds. The covalent bond is a bond formed when two atoms share one or more electron pairs. Each atom contributes an equal number of electrons towards the bond formation.
Methane is the major part of natural gas and is available in nature, abundantly. Methane is a colourless and odourless gas and occurs in gaseous form at room temperature and pressure. It is soluble in organic solvents like ethanol, methanol, benzene, toluene, etc. Methane is less soluble in water.
