$CATEGORY: Science - TicTacLearn/3. Atoms and molecules/3. Atoms and molecules--What is an Atom

//Multiple Choice
The atom is defined as a\:
{
~Smallest particle of a compound
=Fundamental unit of matter
~Indivisible unit of energy
~Building block of life
}

What is the constructive unit of an anthill?
{
~Small particles of wood
=Small particles of sand
~Small particles of clay
~Small particles of soil
}

How many atoms are needed to create a sheet with a thickness equal to that of a piece of paper?
{
~Trillions
~Thousands
=Millions
~Infinity
}

Who proposed that elements should be represented by one or two letters from their names?
{
=Jacob Berzilius
~J.J. Thomson
~John Dalton
~Niels Bohr
}

Who uses the symbols of elements in a specific context?
{
~J.J. Thomson
=John Dalton
~Marie Curie
~Dmitri Mendeleev
}

Which is accepted as the universal reference for determining atomic mass?
{
~C-12 isobar
~C-14 isotope
=C-12 isotope
~C-14 isobar
}

Who approves the names of the elements?
{
~UNESCO
=IUPAC
~ICZN
~WHO
}

Which of the following elements has the atomic mass closest to 16 amu?
{
~Carbon
=Oxygen
~Hydrogen
~Nitrogen
}

What were the origins of the names of elements in the early days?
{
~Based on their atomic number.
~Based on their color.
~Based on their atomic mass.
=Location of their initial discovery.
}

Which element is represented by the symbol Al?
{
~Ammonia
~Argon
=Aluminum
~Alkali
}


What is the Latin name of iron?
{
=Ferrum
~Ferris
~Fero
~Ferro
}

Where does the word “Gold” derive from?
{
~Golus
=Geolu
~Golba
~Gaea
}

The chlorine is represented by the symbol\:
{
~CH
~Ch
~CL
=Cl
}

The atomic mass of oxygen is\:
{
~1 u
~18 u
~1.33 u
=16 u
}

What does "u" represent in atomic mass?
{
~Unique mass
~Uranium
~Universal
=Unified mass
}

Who is known as the father of modern atomic theory?
{
~Niels Bohr
~J.J. Thomson
~Albert Einstein
=John Dalton
}

What is the symbol for the element Calcium?
{
~Cs
~C
=Ca
~Cl
}

Which element is represented by the symbol “Ne”?
{
~Nitrogen
=Neon
~Neptunium
~Nickel
}

What is the atomic mass of Carbon (C)?
{
=12 u
~16 u
~11 u
~18 u
}


//True or False

The constructive unit of all substances is an atom.{T}

Atoms do not influence our activities.{F}

Element symbols contain one or two letters from the element's name.{T}

The element hydrogen is represented by the symbol “h.”{F}

The symbol of iron is derived from its Latin name.{T}

Silver and silicon are represented by the symbols Ag and Si, respectively.{T}

The carbon monoxide is formed by one mole of carbon and two mole of oxygen.{F}

Each element has a characteristic atomic mass.{T}

The symbol 'C' stands for Chlorine.{F}

The oxygen reacts with many elements to form compounds.{T}

The atomic mass of an element is always a whole number.{F}

The atomic mass unit is based on the mass of an oxygen atom.{F}

//Match the Following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Fe -> Iron
=Pb -> Lead
=F -> Fluorine
=Ag -> Silver
=Au -> Gold
}

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