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WorksheetsUnit 2
Total questions: 20
Worksheet time: 10mins
What is a chemical change?
Formation of a new substance with new properties
Matter that can’t break down
Change of form and appearance
Something made out of matter
Mark 2 chemical changes.
Ice melting
Rust
Digesting food
Boiling water
What is not an example of a physical change.
Glass molding
Wood rotting
Mixing candles
Boiling water
How many atoms are I does C3H6O have?
15
23
47
10
How many protons are in one atom of iron.
45
38
26
18
Is Fe2O3 —> F + O3 balanced?
True
False
What group is copper in?
10
5
18
11
How many valence electrons does neon have?
8
5
4
2
What’s golds atomic number?
67
79
128
54
Helium is the most reactive.
False
True
What type is silicon.
Polyatomic metal
Noble gas
Metaloid
Non metal
What is barium’s atomic mass.
72.630
118.7
137.33
207.2
Cesium is one of the most reactive element.
True
False
What is a compound?
Change of form or appearance.
Substance made of two or more elements.
A matter that can’t be created or destroyed.
Something you bake with.
What group is radon in?
13
4
7
18
How many protons are in one atom of uranium?
34
92
15
26
Where are the noble gases located in the PTE??
Group 18
Group 17
Group 13
Group 15
What group are the most reactive reactive elements in?
Group 18
Group 1
Group 2
Group 14
How many elements does Na4As3HW2 have?
5
4
3
6
Electrons are located inside the nuclei.
True
False
