I LOVE MY MOM

~LETS THINK TOGETHER~

If you want to have this sentence, you will need words and also an

alphabet. This can be relate to the concept of chemistry, where those

of alphabet are the atoms, the words are the elements and the

sentence are the molecule.

Atom and molecule

LEARNING OUTCOMES

1. Define atom, elements and molecule.2. Describe the development of atomic model.3. Define proton number, neutron number and

nucleon number. 4. Determine the proton number, neutron

number and nucleon number of the element given.

MOLECULE

PROBLEM SOLVING

MOLECULE

ATOM

QUIZZES

HISTORY

ATOM

DEFINITION OF ATOM An atom is the smallest unit of a particular

substance. (SEE VIDEO) Atoms are use to create the elements.EXAMPLE : Iron (Fe), Zinc (Zn)

DEFINITION OF MOLECULE Molecule are small particle that made up of

tinier particles called atoms. (SEE VIDEO) These molecules made up all living and non living

things.EXAMPLE : Ammonia (NH3), Water (H20)

STRUCTURE OF ATOM

Consist of

The red and black circles in the centre are the proton and neutron, they both make up the nucleus.

The blue circle is the electron. Electrons move around the nucleus through its

orbit.

Table below show you the relative mass and charge of these components of the atoms.

Particle Charge Mass

Proton +1 1

Electron -1 Negligible (0.00054)

Neutron 0 1

STRUCTURE OF MOLECULE

Molecules are made from as few as two atoms to hundred of millions atoms.

PROBLEM SOLVING

There are some terms that you need to know,that is: Atomic number - Also called proton number,

this is the number of protons the atom has.

Mass number - This basically tells you the number of particles in the nucleus.

EXAMPLE:

The top number is the mass number and thebottom is the atomic/proton number. So, neutron no = mass no – atomic/proton no = 56 – 26 = 30

QUESTION 1QUESTION 2QUESTION 3

QUESTION 1

Which of these choices is NOT a major part of an atom?

A)ElectronsB)ProtonsC)NeutronsD)All are parts of an atom

QUESTION 2

Which of these element is a MOLECULE?

A)HydrogenB)WaterC)MagnesiumD)Calcium

QUESTION 3

One of the element consist of mass no. 72 and 30 no. of neutrons. What is the proton no. for that element?

A)42B)102C)24D)48

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