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WorksheetsIntro to Chemistry Review
Total questions: 45
Worksheet time: 23mins
What chart is used to organize the elements by atomic number?
Atomic Table
Periodic Table
Kitchen Table
What is an atom?
Smallest particle of a substance
Raw materials made of only one kind of atom
What is a compound?
Substances with molecules that have atoms from different elements
Two or more atoms joined together
What is a neutron?
Particle in an atom with a POSITIVE charge
Particle in an atom with a NEGATIVE charge
Particle in an atom with a NO charge
What is a proton?
Particle in an atom with a POSITIVE charge
Particle in an atom with a NEGATIVE charge
Particle in an atom with a NO charge
Which particles are located in the nucleus?
Electrons
Neutrons
Protons
The number of protons is also equal to which number?
Atomic Number
Phone Number
Prime Number
Which element has 11 protons?
Sodium
Magnesium
Potassium
Calcium
What makes up an atom?
Protons, Neutrons, Electrons
Aluminum, Carbon, Neon
Solid, Liquid, Gas
Metals, Non-metals, Metalloids
What particle is located in the nucleus and has a positive charge?
Protons
Electrons
Neutrons
Which particle is located in the nucleus and has a neutral charge?
Protons
Electrons
Neutrons
What particle is found OUTSIDE orbiting the nucleus?
Protons
Electrons
Neutrons
An atom is the smallest unit of matter.
Agree
Disagree
You should NEVER wear safety goggles when working with chemicals.
Agree
Disagree
This model represents an element in the Periodic Table. Which element does this atomic model represent?
Substances that are made up of ONLY one type of atom (element) or compound.
Heterogeneous mixture
Pure substance
Suspension
Homogeneous mixture
The particle diagram shown is a:
pure substance
mixture
What is at the center of every atom?
nuclear
nucleus
electron
molecule
An electron of an atom...
lives inside the nucleus and has a neutral charge.
circles the nucleus and has a positive charge.
lives inside the nucleus and has a negative charge.
circles the nucleus and has a negative charge.
The number of protons in an atom is equal to the number of _ .
(a)
There are _ elements on the Periodic Table.
(a)
A subscript...
the number of protons in an atom.
the number of molecules present.
shows the number of atoms of a specific element in a compound.
the number an element is on the periodic table.
How many different elements are present in H2COCH2
5
4
3
2
Calculate the number of Oxygen atoms in Al(OH)3
1
2
3
4
The ______ are numbers found on the lower right-hand side of an element symbol.
Coefficient
Exponent
Multiplier
Subscript
How many NEUTRON are there in this Hydrogen?
2
1
0
What makes up the nucleus?
Protons + Neutrons
Electrons+ Protons
Neutrons + Electrons
What are three subparticles of an atom?
Proton, Neutron, Electron
Hydrogen, Oxygen, Helium
One Oxygen and two Hydrogen. H2O
How many different elements are present in H2COCH2
5
4
3
2
Calculate the number of Oxygen atoms in Al(OH)3
1
2
3
4
How many atoms are there TOTAL in H2SO4 ?
6
5
7
3
What does the subscript in a chemical formula tell you?
How many molecules are present
How many atoms are present
How many elements are present
How many neutrons are present
How many elements are in this chemical formula? NaHCO3
1
2
3
4
NaCl is the chemical formula for salt. Is NaCl considered a compound or an element?
element
compound
both
neither
