CHEMISTRY

1. A property of objects, transferable among them via fundamental interactions, which can be converted into different forms but not created or destroyed.
6. A branch of physical science that studies the composition, structure, properties and change of matter.
8. A subatomic particle, symbol p or p+, with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron.
9. The basic unit of chemistry.
10. Defined as anything that has rest mass and volume (it takes up space) and is made up of particles.
11. a charged species, an atom or a molecule, that has lost or gained one or more electrons.
12. A concept in chemistry that has different (but similar) meanings if referred to a single pure substance or a mixture.
15. A subatomic particle, symbol e− or β−, with a negative elementary electric charge.

2. A subatomic particle, symbol n or n0, with no net electric charge and a mass slightly larger than that of a proton.
3. an ion with fewer electrons than protons, giving it a positive charge.
4. An ion with more electrons than protons, giving it a net negative charge.
5. A tabular arrangement of the chemical elements, organized on the basis of their atomic number (number of protons in the nucleus), electron configurations, and recurring chemical properties.
6. A pure chemical substance composed of more than one element.
7. A homogeneous mixture composed of only one phase.
13. An electrically neutral group of two or more atoms held together by chemical bonds.
14. a column of elements in the periodic table of the chemical elements. (also known as a family)