CHEMISTRY

3. / is a physical property that relates the mass of a substance to its volume.
5. / the 1st and 8th element resemble one another in physical & chemical properties.
6. / atoms of the same elements having a different number of neutrons
8. / is a measure of how hot or cold an object is.
11. / modern periodic table
12. / is anything that has mass and occupies space.
14. / is a quantity that compares the density of a substance with the density of water at 4'C
15. / deals with the study of matter--its composition, properties, and transformations.
17. / process of comparing something with a standard.
19. / a group consisting of 3 elements with the same properties.
21. / positively charged particles
22. / an element located in group 2A of periodic table.
27. / are shiny substance that conduct heat and electricity.
28. / refers to the smallest estimated value taken directly from the device.

1. / a row in the periodic table
2. / uncharged particles
4. / an element located in group 1A.
7. / cannot be broken down into simpler components by ordinary mechanical means; fixed composition
8. / an element contained in one of the 10 columns in the periodic table
9. / is the name of the force exerted on an object due to the acceleration of gravity.
10. / simplest known substance.
12. / amount of matter in a body
13. / number of protons + number of neutrons
16. / negatively charged particles
18. / have properties intermediate between metals and nonmetals.
20. / a compound that contains both a hydrogen atom and a lone pair of electrons so that it can be either an acid or a base.
23. / are poor conductors of heat and electricity.
24. / contains 2 or more components whose composition may be varied.
25. / refers to the smallest exact value taken directly from the device.
26. / a column in the periodic table