True
False, they are by covalent bonds
Organic compounds are covalently bonded molecules that contain carbon, hydrogen, and sometimes other elements like oxygen, nitrogen, sulfur, or phosphorus. Oxygen is not always present in organic compounds, but it is a common element found in many organic molecules.
False. Covalent bonds involve the sharing of electrons between atoms, not the transfer of electrons to form ions.
True. When water boils, the intermolecular hydrogen bonds between water molecules are broken, allowing them to escape as vapor.
False, polymers are molecules made from repeating units of identical or nearly identical compounds called monomers that are linked together by a series of covalent bonds.
True. Both ionic and covalent bonds are strong chemical bonds that hold molecules together by sharing or transferring electrons between atoms. Ionic bonds result from the attraction between positively and negatively charged ions, while covalent bonds involve the sharing of electron pairs between atoms.
False. A substance is organic if it contains carbon-hydrogen bonds, regardless of whether it originated from living or non-living sources.
True. Atoms can form bonds with each other through the attraction between their electrons, resulting in the formation of molecules.
False. Uracil is a nitrogen base found in RNA molecules, not DNA. In DNA, thymine is the equivalent nitrogen base to uracil.
Not all compounds with carbon are considered organic compounds; only compounds containing carbon-hydrogen (C-H) bonds are classified as organic compounds. Inorganic compounds may also contain carbon but lack C-H bonds, such as carbonates like CO3^2- or oxides like CO2.
False. When sugar is dissolved in water, it is a physical change where the sugar molecules are dispersed in the water but no chemical bonds are formed between them.
False. When an ionic solid mixes with water, the solute breaks down into ions, not individual molecules. This process is known as dissociation, where the ionic bonds are broken, and the ions are surrounded by water molecules.