UCF CHEMISTRY PLACEMENT TEST LATEST VERSIONS UPDATED | 2024

UCF CHEMISTRY PLACEMENT TEST LATEST VERSIONS UPDATED 2024 Atom the smallest particle of an element that retains its identity in a chemical reaction Matter Anything that has mass and takes up space Solid A form of matter that has a definite shape and volume; strong ionic bonds liquid A state of matter that has no definite shape but has a definite volume. Gas A state of matter with no definite shape or volume Mixture A combination of two or more substances that are not chemically combined heterogeneous mixture A mixture in which different materials can be distinguished easily homogeneous mixture A mixture in which substances are evenly distributed throughout the mixture Compound A substance made up of atoms of two or more different elements joined by chemical bonds. Can be separated by chemical means Molecule A group of atoms bonded together Element A pure substance made of only one kind of atom ionic bond Formed when one or more electrons are transferred from one atom to another Proton positively charged particle Neutron A subatomic particle that has no charge and that is found in the nucleus of an atom Electron A subatomic particle that has a negative charge covalent bond A chemical bond that involves sharing a pair of electrons between atoms in a molecule hydrogen bond Attraction between a slightly positive hydrogen atom and a slightly negative atom. metallic bond a bond formed by the attraction between positively charged metal ions and the electrons around them One gallon 16 cups 1 cup 237 milliliters 1 milliliter 1 cubic centimeter (cc) 1 kilogram 2.2 pounds Density Mass per unit volume Sub-atomic particles protons, neutrons, electrons Isotope An atom with the same number of protons and a different number of neutrons from other atoms of the same element. ionic compound A compound that consists of positive and negative ions covalent compound a chemical compound formed by the sharing of electrons Ion An atom or group of atoms that has a positive or negative charge. polyatomic ion a tightly bound group of atoms that behaves as a unit and has a positive or negative charge