Chemistry

2. is a basic, ionic salt of an alkali metal or alkaline earth metal chemical element.
3. are atoms of the same element, having same atomic number but different atomic masses due to the difference in the number of neutrons present.
5. has no charge
9. A measure of the rate at which a defined amount of matter
12. is a way to measure how tightly packed an object is. Denser objects have less empty space in them
14. name the measure of one-dimensional objects
15. The act or state of being changed from one unit into another
16. positively charge
17. is a measure of the thermal energy given off by moving particles
19. The ability of a measurement to match the actual value of the quantity being measured
21. current (from Latin tellūs, "earth"), or Earth current, is an electric current which moves underground or through the sea
22. is an atom or molecule in which the total number of electrons is not equal to the total number of protons
23. number the number of protons in the nucleus of an atom of an element
24. is a positively charged ion. Thus it has fewer electrons than protons. It is also attracted to the cathode in the process of electrolysis
25. system is a system of measurement in a decimal form (each successive unit of measure is 10 times larger or smaller than the preceding unit). Its name is from the Greek (métron, to measure).
26. the amount of space an object takes up.
27. basic unit of an

1. The halogens or halogen elements (/ˈhælədʒɨn/) are a group in the periodic table consisting of five chemically related elements, fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine
4. are the elements found along the stair-step line that distinguishes metals from non-metals
6. Close, careful conformity to a convention, pattern, or objective standard in minute detail.
7. refering to minutes , seconds hours
8. is the process observing and recording the observations that are collected as part of a research effort.
10. the force that gravitation exerts upon a body
11. gravity the ratio of the density of a substance
13. negatively charge
16. table is a tabular arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations and etc.
18. measurement is a definite magnitude of a physical quantity, defined and adopted by convention or by law, that is used as a standard for measurement
20. metals comprise, at minimum, those metallic chemical elements which have historically been used as components in alloys used to mint coins.
25. good conductor of heat and electricity
28. the quantitative measure of inertia