$CATEGORY: Science - TicTacLearn/3. Atoms and molecules/3. Atoms and molecules--What is a Molecule

//Multiple Choice

What are molecules?
{
~The smallest unit of an ion
~The smallest unit of a compound
=Group of two or more atoms
~Single atom of a compound
}

Which represents the property of any compound?
{
~Elements
~Atoms
~Particles
=Molecules
}

What is the mass ratio of magnesium and sulfur in a magnesium sulfide?
{
~1\:1
~4\:3
~5\:2
=3\:4
}

What does the term “mass ratio” mean?
{
=The ratio of the masses of elements in a compound.
~The weight of one molecule.
~The size of an atom.
~The mass of reactants.
}

What holds atoms together?
{
~Molecular structure
=Chemical bond
~Van der Waals force
~Ionic attraction
}

How many atoms are present in a molecule of carbon?
{
~4
~5
~1
=Indefinite
}

Which of these molecules is diatomic?
{
~Carbon-dioxide
~Methane
=Oxygen
~Water
}

Choose the odd one based on the atomicity\:
{
~Oxygen
~Chlorine
=Phosphorous
~Nitrogen
}

What is the atomicity of ozone?
{
~4
=3
~2
~1
}

What is the basis of the classification of ions?
{
~Atomic mass
=Kind of charge
~Number of electrons
~Type of bond
}

//True or False

The atoms are combined via the mutual attraction force.{T}

The molecule can exist independently.{T}

Molecules are formed by the combination of the same element only.{F}

Ions are formed when atoms gain or lose electrons.{T}

The sulfur is a polyatomic molecule.{T}

A molecule of oxygen consists of three atoms of oxygen.{F}

The molecule of carbon has a very simple structure.{F}

The net charge is present on the ions.{T}

The negatively charged ions are called cations.{F}

//Match the Following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Ions -> Charged particles (e.g., Na⁺, Cl⁻)
=Molecules -> Group of atoms (e.g., H₂O, CO₂)
=Atoms -> Basic unit of an element (e.g., H, O)
=Compounds -> Combination of elements (e.g., NaCl, H₂O)
}

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