True
False
FALSE
A ray has no endpoints true or false
False. Pure gold is 24 karat.
false
That statement is false.
False. Water is a molecule made of 2 parts hydrogen one part oxygen. NOT AN ELEMENT.
False.
False. Combining hydrogen and oxygen to form water is a chemical change, not a physical change. During this process, the hydrogen and oxygen atoms chemically react to create new substances, resulting in the formation of water molecules. This transformation involves breaking and forming bonds, which is characteristic of chemical changes.
False, a Hydrogen has 1 electron and Oxygen has 8 electrons
True. Water is a polar molecule because it has a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom due to differences in electronegativity. This polarity allows water to form hydrogen bonds with other water molecules.
Water is a polar molecule where the electrons spend more time in orbitals around the oxygen atom because it is significantly more electronegative than the hydrogen atoms. So, false is the answer.
False. When an electric current passes through water, it typically causes electrolysis, which splits water molecules into hydrogen and oxygen gases rather than causing combustion. However, if the hydrogen gas produced is ignited in the presence of oxygen, it can combust, but the current itself does not cause the water to combust directly.
False. Diamond and quartz are minerals composed of multiple elements. Diamond is composed of carbon atoms, while quartz is composed of silicon and oxygen atoms.
False. Water particles, whether in liquid or vapor form, are made up of water molecules consisting of two hydrogen atoms bonded to one oxygen atom.
False False False FalseFalse
True. Water consists of one oxygen atom that has formed covalent bonds with two hydrogen atoms, resulting in the chemical formula H2O.