Check off all the ways we can tell that a chemical change has occurred.
Bubbles of gas appear
A precipitate forms
Color change
Temperature change
Emission of light
The substance has been cut up
Phase changes
Emission of sound
Odor change
Electrical energy
An element always loses electrons, conducts both electricity and heat, and is malleable, ductile, and shiny. What periodic family is it from?
Metalloid
Non-metal
Metal
Liquid
Which elemental group is the staircase? These elements conduct electricity somewhat, some shiny, and dull, medium brittleness.
Alkali Metals
Solids
Halogens
Metalloids
Which elemental group always loses one electron?
Alkaline Earth Metals
Noble Gases
Which group is reactive, and which is very unreactive?
Alkaline Earth Metals, Metalloids
Alkali Metals, Halogens
Halogens, Noble Gases
Noble Gases, Alkaline Earth Metals
Which periodic family is Magnesium?
What is the atomic number of Fe
26
6
53
89
What is the atomic mass of Oxygen?
69.72
19.00
16.00
112.41
What is the (more common) ion charge of Nickel?
4-
3+
2+
1-
Which scientist created this atomic theory? The Billiard Ball: Discovered atoms and compounds. Said atoms of the same element are identical.
Thomson
Newton
Rutherford
Dalton
