SlideShare a Scribd company logo
2
Most read
3
Most read
13
Most read
Atoms and Molecules.pptx
Elements are defined as pure substances that contain
one type of atom while compounds are pure substances that
contain two or more elements that ate chemically united.
Let’s Learn
Atom is the basic unit of an element having all he
characteristics of that particular element. Generally, the atom
consists of a tiny center called nucleus where the proton and
neutron are located and outside the nucleus on different energy
levels are the electrons arranged in a systematic way.
Proton is a stable subatomic particle that has a positive
charge equal in magnitude to a unit of electron charge and a
rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of
an electron.
Neutron is a neutral subatomic particle that is a
constituent of every atomic nucleus
An electron is a negatively charged subatomic particle. It
can be either free (not attached to any atom), or bound to the
nucleus of an atom. Electrons in atoms exist in spherical shells of
various radii, representing energy levels. The larger the spherical
shell, the higher the energy contained in the electron.
Molecules is smallest particle of a substance that has
all of the physical and chemical properties of that substance.
Molecules are made up of one or more atoms.
Difference Between Atoms and
Molecules
Dalton’s Atomic theory
• Matter consists of individual particles called atoms.
• Atoms cannot be created, divided, destroyed, nor converted to
another atom.
• Atoms of the same elements have identical sets of properties
but atoms of different elements differ in property.
• Compounds are composed of atoms of elements that combine in
single whole ratios.
• A chemical reaction involves only in separation, combination, or
rearrangements of atoms and does not involve creation or
destructions of atoms.
Structure of the Atom
• The atoms has two distinct regions:
a. the nucleus, which is very small, dense, and positively
charged, and where the protons and neutrons reside
b. the region outside the nucleus where electrons are
located
Elements differ in the number of protons, electrons,
and neutrons. The identity of any element is based on the
number of protons which equates to the atomic number.
The atomic number is equal to the number of protons. For
a neutral atom, the number of protons is equal to the
number of electrons.
Mass number = number of protons + number of neutrons
To get the number of neutrons, rearrange the formula for mass
number to become:
Number of neutrons = mass number – number of protons
or
Number of neutrons = mass number – atomic number
n = A - Z
The mass number is not the same as the atomic mass that you
will find in the periodic table. Mass numbers are always integers.
a. number of protons = atomic number = 6
b. number of neutrons = mass number – atomic number
= (12 – 6 = 6)
c. number of electrons = 6
Example 1.
Determine the number of protons,
electrons, and neutrons, in the atomic symbol
representing magnesium.
Magnesium contains:
- 12 protons, since number of protons is the same as the
atomic number
- 12 neutrons, since mass number minus atomic number
- 12 electrons, since the neutral atom contains the same
number of protons and electrons
Example 2.
How many protons, electrons, and
neutrons are there in the atomic symbol
chromium?
52𝐶𝑟24
3
+
Chromium contains:
- 24 protons, the original number of proton.
- 21 electrons, since the number of electron is less than the number of
proton because the atom has accepted three more protons. (24 – 3 = 21)
- 28 neutrons, since the mass number minus the atomic number. ( 52 – 24
= 28)

More Related Content

PPTX
Discovery of Electrons and Protons
PPTX
Topic 2: Structure of matter
PPT
The Structure of an Atom
PPTX
Valence Electrons
PPTX
RUTHERFORD ‘ S MODEL OF AN ATOM
PPT
Particle Theory of Matter
PPT
Chemical Names and Formulas
PPTX
Isotopes & Atomic Mass
Discovery of Electrons and Protons
Topic 2: Structure of matter
The Structure of an Atom
Valence Electrons
RUTHERFORD ‘ S MODEL OF AN ATOM
Particle Theory of Matter
Chemical Names and Formulas
Isotopes & Atomic Mass

What's hot (20)

PPTX
Charles law
PPT
Force & Motion
PPTX
Waves ppt.
PPTX
solution and solubility
PPT
Law of multiple proportions and law of definite proportions
PPTX
Discovery of the structure of the Atom
PPT
Elements
PPT
Structure Of Atoms
PPT
Chemical Formula
PPT
Chapter 2 the structure of the atom
PPT
PPT
atoms and molecules
PDF
MOLE; Avogadro's Number; Percentage Composition
PPTX
Metalloids
PPTX
discovery of electrons
PPT
General relativity presentation.ragesh,asmitha,m.d.t
PPTX
Friction
PPTX
the elements, origin of their names and their symbols
PPTX
Chemical Compounds
Charles law
Force & Motion
Waves ppt.
solution and solubility
Law of multiple proportions and law of definite proportions
Discovery of the structure of the Atom
Elements
Structure Of Atoms
Chemical Formula
Chapter 2 the structure of the atom
atoms and molecules
MOLE; Avogadro's Number; Percentage Composition
Metalloids
discovery of electrons
General relativity presentation.ragesh,asmitha,m.d.t
Friction
the elements, origin of their names and their symbols
Chemical Compounds
Ad

Similar to Atoms and Molecules.pptx (20)

PPT
Atomicsstructure
PPT
Chemistry Lecture Slide Week 1
PPT
03a matter and structure of atoms
PPT
Atomic Structure and Isotopes 2024 7.ppt
PPT
Chapter 4
PPT
Getting inside the atom part 2
PPTX
Occupational Therapy Chemical Composition of the Human Body
PPTX
Arkan Karim.pptxينمزلاننلازلةىكبلةىكبةىكب
PPT
Atomic structure
PPTX
Chemistry fundamentals part 2
PPTX
PPTX
Atomic structrure and periodic table
PDF
Atomic Structure for educational purposes
PPTX
Structure of substances 4.1 Historical Development of The Atomic Nature of Su...
PPTX
Introduction To Chemistry Power Point
PDF
1. Foundations of Chemistry-Basic Chemistry
PPT
Structure of an Atom ppt cscope
PPTX
Nstional Learning Camp Grade 8 POWERPOINT.pptx
PPTX
HUDA 9TH PPT-1.pptx
Atomicsstructure
Chemistry Lecture Slide Week 1
03a matter and structure of atoms
Atomic Structure and Isotopes 2024 7.ppt
Chapter 4
Getting inside the atom part 2
Occupational Therapy Chemical Composition of the Human Body
Arkan Karim.pptxينمزلاننلازلةىكبلةىكبةىكب
Atomic structure
Chemistry fundamentals part 2
Atomic structrure and periodic table
Atomic Structure for educational purposes
Structure of substances 4.1 Historical Development of The Atomic Nature of Su...
Introduction To Chemistry Power Point
1. Foundations of Chemistry-Basic Chemistry
Structure of an Atom ppt cscope
Nstional Learning Camp Grade 8 POWERPOINT.pptx
HUDA 9TH PPT-1.pptx
Ad

More from MartinGeraldine (20)

PPTX
Isip at Kilos-loob, Gagamitin Ko.pptx
PPTX
Ang Bayan Kong Plipinas.pptx
PPTX
Chapter IV- Thesis (Sample).pptx
PPTX
Pagtukoy at Pagtugon sa Epekto ng Migrasyon sa.pptx
PPTX
Responsible Parenthood.pptx
PPTX
Agwat Teknolohikal sa Pagitan ng mga Henerasyon.pptx
PPTX
Ideal Gas Law.pptx
PPTX
BATCH 2021 - 2022 (Graduation Requirements).pptx
PPTX
Seat Belt, Cybercrime, Anti-Child Pornography Act.pptx
PPTX
Isang Pagbubuod ng Katotohanan.pptx
PPTX
Philippine AIDS Prevention and Control Act of.pptx
PPTX
Avogadro’s Law.pptx
PPTX
Interactions among Living Things in Mangrove Swamps.pptx
PPTX
Proving that a Quadrilateral is a Parallelogram.pptx
PPTX
Environment Awareness Act and Traditional and Alternative Medicine Act.pptx
PPTX
Maternal Health Concerns.pptx
PPTX
Mga Isyu sa Dignidad at Sekswalidad.pptx
PPTX
Combined Gas Law.pptx
PPTX
Median and Area of a Trapezoid.pptx
PPTX
Pangalay and Sua Sua Dance.pptx
Isip at Kilos-loob, Gagamitin Ko.pptx
Ang Bayan Kong Plipinas.pptx
Chapter IV- Thesis (Sample).pptx
Pagtukoy at Pagtugon sa Epekto ng Migrasyon sa.pptx
Responsible Parenthood.pptx
Agwat Teknolohikal sa Pagitan ng mga Henerasyon.pptx
Ideal Gas Law.pptx
BATCH 2021 - 2022 (Graduation Requirements).pptx
Seat Belt, Cybercrime, Anti-Child Pornography Act.pptx
Isang Pagbubuod ng Katotohanan.pptx
Philippine AIDS Prevention and Control Act of.pptx
Avogadro’s Law.pptx
Interactions among Living Things in Mangrove Swamps.pptx
Proving that a Quadrilateral is a Parallelogram.pptx
Environment Awareness Act and Traditional and Alternative Medicine Act.pptx
Maternal Health Concerns.pptx
Mga Isyu sa Dignidad at Sekswalidad.pptx
Combined Gas Law.pptx
Median and Area of a Trapezoid.pptx
Pangalay and Sua Sua Dance.pptx

Recently uploaded (20)

PDF
English Language Teaching from Post-.pdf
PDF
Phylum Arthropoda: Characteristics and Classification, Entomology Lecture
PDF
102 student loan defaulters named and shamed – Is someone you know on the list?
PPTX
Onica Farming 24rsclub profitable farm business
PDF
Landforms and landscapes data surprise preview
PDF
The Final Stretch: How to Release a Game and Not Die in the Process.
PPTX
COMPUTERS AS DATA ANALYSIS IN PRECLINICAL DEVELOPMENT.pptx
PDF
Mga Unang Hakbang Tungo Sa Tao by Joe Vibar Nero.pdf
PDF
Origin of periodic table-Mendeleev’s Periodic-Modern Periodic table
PPTX
NOI Hackathon - Summer Edition - GreenThumber.pptx
PDF
UTS Health Student Promotional Representative_Position Description.pdf
PDF
LDMMIA Reiki Yoga S2 L3 Vod Sample Preview
PPTX
Introduction_to_Human_Anatomy_and_Physiology_for_B.Pharm.pptx
PDF
Module 3: Health Systems Tutorial Slides S2 2025
PPTX
Presentation on Janskhiya sthirata kosh.
PPTX
Cardiovascular Pharmacology for pharmacy students.pptx
PPTX
Strengthening open access through collaboration: building connections with OP...
PPTX
Introduction and Scope of Bichemistry.pptx
PPTX
How to Manage Loyalty Points in Odoo 18 Sales
PPTX
UNDER FIVE CLINICS OR WELL BABY CLINICS.pptx
English Language Teaching from Post-.pdf
Phylum Arthropoda: Characteristics and Classification, Entomology Lecture
102 student loan defaulters named and shamed – Is someone you know on the list?
Onica Farming 24rsclub profitable farm business
Landforms and landscapes data surprise preview
The Final Stretch: How to Release a Game and Not Die in the Process.
COMPUTERS AS DATA ANALYSIS IN PRECLINICAL DEVELOPMENT.pptx
Mga Unang Hakbang Tungo Sa Tao by Joe Vibar Nero.pdf
Origin of periodic table-Mendeleev’s Periodic-Modern Periodic table
NOI Hackathon - Summer Edition - GreenThumber.pptx
UTS Health Student Promotional Representative_Position Description.pdf
LDMMIA Reiki Yoga S2 L3 Vod Sample Preview
Introduction_to_Human_Anatomy_and_Physiology_for_B.Pharm.pptx
Module 3: Health Systems Tutorial Slides S2 2025
Presentation on Janskhiya sthirata kosh.
Cardiovascular Pharmacology for pharmacy students.pptx
Strengthening open access through collaboration: building connections with OP...
Introduction and Scope of Bichemistry.pptx
How to Manage Loyalty Points in Odoo 18 Sales
UNDER FIVE CLINICS OR WELL BABY CLINICS.pptx

Atoms and Molecules.pptx

  • 2. Elements are defined as pure substances that contain one type of atom while compounds are pure substances that contain two or more elements that ate chemically united.
  • 3. Let’s Learn Atom is the basic unit of an element having all he characteristics of that particular element. Generally, the atom consists of a tiny center called nucleus where the proton and neutron are located and outside the nucleus on different energy levels are the electrons arranged in a systematic way.
  • 4. Proton is a stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron. Neutron is a neutral subatomic particle that is a constituent of every atomic nucleus An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.
  • 5. Molecules is smallest particle of a substance that has all of the physical and chemical properties of that substance. Molecules are made up of one or more atoms.
  • 6. Difference Between Atoms and Molecules
  • 7. Dalton’s Atomic theory • Matter consists of individual particles called atoms. • Atoms cannot be created, divided, destroyed, nor converted to another atom. • Atoms of the same elements have identical sets of properties but atoms of different elements differ in property. • Compounds are composed of atoms of elements that combine in single whole ratios. • A chemical reaction involves only in separation, combination, or rearrangements of atoms and does not involve creation or destructions of atoms.
  • 8. Structure of the Atom • The atoms has two distinct regions: a. the nucleus, which is very small, dense, and positively charged, and where the protons and neutrons reside b. the region outside the nucleus where electrons are located
  • 9. Elements differ in the number of protons, electrons, and neutrons. The identity of any element is based on the number of protons which equates to the atomic number. The atomic number is equal to the number of protons. For a neutral atom, the number of protons is equal to the number of electrons.
  • 10. Mass number = number of protons + number of neutrons To get the number of neutrons, rearrange the formula for mass number to become: Number of neutrons = mass number – number of protons or Number of neutrons = mass number – atomic number n = A - Z The mass number is not the same as the atomic mass that you will find in the periodic table. Mass numbers are always integers.
  • 11. a. number of protons = atomic number = 6 b. number of neutrons = mass number – atomic number = (12 – 6 = 6) c. number of electrons = 6
  • 12. Example 1. Determine the number of protons, electrons, and neutrons, in the atomic symbol representing magnesium. Magnesium contains: - 12 protons, since number of protons is the same as the atomic number - 12 neutrons, since mass number minus atomic number - 12 electrons, since the neutral atom contains the same number of protons and electrons
  • 13. Example 2. How many protons, electrons, and neutrons are there in the atomic symbol chromium? 52𝐶𝑟24 3 + Chromium contains: - 24 protons, the original number of proton. - 21 electrons, since the number of electron is less than the number of proton because the atom has accepted three more protons. (24 – 3 = 21) - 28 neutrons, since the mass number minus the atomic number. ( 52 – 24 = 28)