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WorksheetsAtoms and Molecules
Total questions: 12
Worksheet time: 38mins
What is the smallest part of a chemical element that keeps the properties of that element?
an electron
a neutron
a proton
an atom
In the following chemical equation, name a product:
carbon dioxide (CO2)
water (H2O)
carbonic acid (CH2O3)
ozone (O3)
A neutral atom has:
the same number of protons and neutrons
the same number of protons and electrons
the same number of electrons and neutrons
the same number of atoms and molecules
Elements in Group 1 on the periodic table have:
1 valence electron
2 valence electrons
4 valence electrons
8 valence electrons
All the molecules on the left side of a chemical equation are known as (a) .
What holds the nucleus of an atom together?
gravity
electromagnetism
the strong force
friction
Vertical columns on the periodic table are known as:
slices
groups
periods
valences
Atoms are NOT destroyed in a chemical reaction. This is explained by what law?
Law of Conservation of Mass
Law of Diminishing Returns
Law of Chemistry
Law of Falling Objects
The (a) in an atom have a positive charge.
A coefficient in a chemical equation tell you what?
How many times to do the equation
How many atoms you have
How many products you have
How many molecules you have
On the periodic table of elements, Aluminum (Al) is number 13. How many protons does Aluminum have in its nucleus?
13
26.9
3
8
What coefficient would need to go in front of the O2 in this chemical equation to make it balanced?
C5H12 + ?O2 -----> 5CO2 + 6H2O
2
4
8
it doesn't need a coefficient
