Across
- 2. A pure substance made of only one kind of atom
- 5. The smallest part of an element that still has the same properties as the element (i.e. melting and boiling points)
- 8. Negatively charged particles located outside the nucleus of an atom
- 10. A chemical bond formed when atoms share three pairs of electrons
- 11. The number of protons in the nucleus of an atom
- 12. The smallest particle of a compound that retains all the properties of the compound and is composed of one or more atoms
- 13. A chemical bond formed when atoms share one pair of electrons
- 15. Particles of no charge (neutral) located in the nucleus of an atom
- 17. A chemical bond formed when atoms share electrons
- 18. A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together
- 19. A charged atom due to the loss or gain of negative electrons
- 20. A chemical bond formed when atoms share electrons
- 21. Created in an atom when it has more protons than electrons
Down
- 1. Uses dots to represent valence electrons around an element's atomic symbol
- 3. Atoms of the same elements that have different numbers of neutrons
- 4. Positively charged particles located in the nucleus of an atom
- 6. Electrons on the outermost energy level of an atom
- 7. The average mass of all the isotopes of an element
- 9. A chemical bond resulting from the attraction between oppositely charged ions
- 14. The possible locations around a nucleus where electrons may be found
- 16. The central part of the atom where protons and neutrons are located