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What is the smallest piece of matter?
Compound
Molecule
Atom
Element
Which of the following is an example of an element?
Air
Carbon Dioxide (CO₂)
Oxygen (O)
Water (H₂O)
What type of bond forms compounds?
Magnetic attraction
Physical bonding
Sharing or transferring electrons
Mixing of elements
Which model describes atoms as tiny indestructible spheres?
Solid Sphere Model
Nuclear Model
Periodic Table Model
Plum Pudding Model
In the periodic table, rows are called:
Periods
Groups
Series
Levels
Which of the following is a mixture?
Water (H₂O)
Salt (NaCl)
Carbon Dioxide (CO₂)
Air
What does 'di-' mean in a compound's name, like carbon dioxide?
One
Four
Three
Two
What are the particles located in the nucleus of an atom?
Neutrons and electrons
Protons and electrons
Electrons
Protons and neutrons
What is the atomic number of an element?
The number of neutrons
The number of electrons
The number of atoms
The number of protons
How can mixtures be separated?
Through oxidation
By bonding atoms
Using physical means
Chemically
Compounds have the same properties as the elements that make them.
False
Atoms are the smallest unit of a compound.
False
An electron has a positive charge.
False
Air is a compound made of gases.
False
In compounds, metals usually come first in the name.
True
The columns in the periodic table are called __________.
Groups
