Across
- 1. - subatomic particle with positive electricity found in all atomic nuclei
- 3. – amount of ability to do the work
- 4. - how likely an element is to form bonds with other elements
- 9. - characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed
- 11. – an electron in an atom’s outermost energy level
Down
- 1. - any property that is measurable; value describes a state of physical system; often referred to as observables
- 2. – chart that organizes elements according to properties
- 5. – electrons in the outer shell
- 6. - vertical columns of elements are called groups, or families
- 7. – a column in the periodic table
- 8. – number of protons in the nucleus of an atom
- 10. – a row in the periodic table
- 12. – a substance that cannot be broken down into simpler substances by ordinary chemical means