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WorksheetsMatter and Chemistry
Total questions: 145
Worksheet time: 2hrs 14mins
The smallest part of an element
atomic number
ion
atom
molecule
True or False: An atom is too small to see, so models are use to explain them.
True
False
the number of protons in the nucleus of each atom of an element
atom
atomic number
atomic mass
mass number
On the periodic table, the elements are listed by_________.
element name (ABC order)
energy level
isotopes
atomic number
A characteristic of a substance that allows it to change to a new substance is a ___________.
Chemical Property
Physical Property
An example of a chemical property is...
mass
melting point
iron rusting
In a stable atom, the atomic number is equal to...
the number of neutrons
the number of electrons
the atomic mass
what is a stable atom?
This could be the dot diagram of
Ne
H
C
F
All matter is made of ________.
energy
atoms
electrons
compounds
CaCO3
Element
Compound
Na2CO3
H2C3O4N5
H2CO4N5
How many atoms of Hydrogen are in this compound
1
2
3
4
Na2CO3
If this reaction occurs in a sealed container, will the mass of the container and everything in it increase, decrease, or stay the same and why?
A substance that undergoes a change in a chemical reaction is______.
an atom
a reactant
Chemistry
a product
Atoms and molecules that result from a chemical reaction are called________________________.
atoms
reactants
Chemistry
products
