Chemistry Definitions Crossword Puzzle

QUESTIONS LIST:

• atom : the smallest unit of an element that retains the properties of that element.
• element : a substance made up of only one type of atom.
• compound : a substance formed when two or more elements chemically combine.
• molecule : a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.
• ion : an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
• isotope : atoms of the same element with different numbers of neutrons.
• periodic table : a table of the chemical elements arranged in order of atomic number.
• covalent bond : a chemical bond formed by the sharing of electron pairs between atoms.
• ionic bond : a chemical bond formed between two ions with opposite charges.
• metallic bond : a bond formed by the attraction between positively charged metal ions and the electrons around them.
• acid : a substance that increases the hydrogen ion concentration in a solution.
• base : a substance that decreases the hydrogen ion concentration in a solution.
• ph scale : a measure of how acidic or basic a solution is.
• electrolysis : a process by which electrical energy is used to cause a non-spontaneous chemical reaction.
• oxidation : the loss of electrons from a substance.
• reduction : the gain of electrons by a substance.
• catalyst : a substance that increases the rate of a chemical reaction without being consumed.
• endothermic : a reaction that absorbs energy from its surroundings.
• exothermic : a reaction that releases energy to its surroundings.
• molar mass : the mass of one mole of a substance, usually expressed in grams per mole.