WorksheetsChemistry Quiz
Total questions: 20
Worksheet time: 18mins
What is the simplest kind of pure substance?
Element
Compound
Homogenous Mixtures
Heterogenous Mixtures
Why kind of mixture is this? All parts of the mixture are visible because they do not mix together.
Heterogeneous
Homogenous
Element
Compound
made up of?
Which element is the least reactive?
Li
Ne
B
C
Students in Mrs. Clark's science class are investigating a substance that has the following properties
-shiny
-bends easily
-hard, not easily broken
Based on these properties how would you classify the substance?
metal
nonmetal
metalloid
Carbon
Hydrogen
Aluminum
Lithium
How do you calculate the number of neutrons? *
Mass = Atomic number - Neutrons
Mass - Atomic number = Neutrons
Atomic number = Neutrons
found in group one of the periodic table; highly reactive
Non-metals
Transition Metals (Groups 3-12)
alkali metals (group 1)
metalloids (semimetals)
Mg + __HCl ---> MgCl2 + H2
The Law of Conservation of Matter
tells how many atoms of an element are contained in one molecule or formula unit.
the starting materials in a chemical reaction
the new substances that are formed in a chemical reaction
A law stating that atoms are not created or destroyed during a chemical reaction.
Process by which substances are changed into different substances with different properties
Chemical Change
Physical Change
Psychic Change
Chimichanga Change
A solid product that forms from a reaction
Precipitate
Gas bubbles
Plasma
What holds matter together?
bonds
cells
glue
gravity
Identifies the number of protons in an atoms nucleus.
Electron Cloud
Atomic Theory
Atomic Number
Mass Number
