science for CRT
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- Most Metals are not...
- liquid at room tempurature
- the elements in a row are what?
- in the same period
- creator of periodic table of elements
- Mendeleev - arranged them by increasing atomic mass
- what are the two most common alkaline earth metals?
- Magniesum and calcium
- metals contain them most what?..
- elements in the table
- location on PR
- you can predict its properties from its placement
- what elements dont not form compunds?
- Noble gases
- how many elements are in the PR?
- over 100 elements
- adjusment to Periodic table in the 1900's
- instead of atomic mass, they arranged it by atomic number
- At room tempurature what state of matter are most metals in?
- gas state
- Where are the valence electrons located in an atom?
- Farthest from the nucleus in an atom
- what does the element indicate about the atom?
- the number of protons in an atom
- the elements in a column are what?
- in the same family
- where do the electrons move?
- around the nucleus
- where are the metals located?
- on the left of the zigzag line
- What specific chareteristic do mettaliods have?
- they share cherecteristics of both metals and non-metals hence the name
- where are the non-metals located on the PR?
- the non-metals are located to the right of the zigzag line
- where are the most reactive metals in the PR?
- group 1, the first column on the left