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7.1 Vocabulary
Vocabulary from science book chapter 7.1
| Question | Answer |
|---|---|
| Physical properties | characteristics of matter that can be seen through direct observation such as density, melting point and boiling point. |
| chemical properties | characteristics of matter that can only be observed when one substance changes into a different substance, such as iron into rust |
| periodic table | a chart that organizes the element by increasing there chemical properties and increasing atomic number |
| period | a row of the periodic table |
| group | a column of the periodic table |
| metal | elements that are typically shiny and good conductors of heat and electricity |
| non metal | elements that are poor conductors of heat and electricity |
| atomic mass unit | a unit of mass equal to 1.66 x 10 to the negative 24 grams which is one twelfth the mass of the isotope carbon-12 |
| atomic mass | the average mass of all the known isotopes of and element, expressed in amu |
| alkali metals | elements in the first group of the periodic table |
| halogens | elements in the group containing fluorine, chlorine, and bromine, among others |
| noble gases | elements in the group containing helium, neon, and argon, among others. |