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J. J. Thomson Discoverer of the Electron (1897)

J. J. Thomson Discoverer of the Electron (1897)

J. J. Thomson Discoverer of the Electron (1897).

By niveditha
(955 views)

Atomic Structure

Atomic Structure

Atomic Structure. What are the 3 major parts of an atom?. What are the 3 major parts of an atom?. Proton Neutron Electron. Draw a diagram showing the location of each part of the atom. Draw a diagram showing the location of each part of the atom.

By keala
(160 views)

Historical Figures In Chemistry

Historical Figures In Chemistry

Historical Figures In Chemistry. Oldies but goodies. Democritus. Atomos The indivisible particle. I’m Aristotle and I banish Democritus!. Boyle and Newton. John Dalton. Matter is made of indivisible atoms Atoms of same element are identical Atoms of different elements are different

By pegeen
(109 views)

Atoms: The Greek Idea

Atoms: The Greek Idea

~ 450 B.C.E., Leucippus and Democritus Atomos : Point at which matter can no longer be subdivided. Atoms: The Greek Idea. ~384 B.C.E., Aristotle: All matter is composed of 4 elements, and all matter is continuous, not atomistic. Atoms: The Greek Idea. THE ATOM.

By armen
(917 views)

Particles in the Atom

Particles in the Atom

Particles in the Atom. Electrons (-) charge no mass located outside the nucleus Protons (+) charge 1 amu located inside the nucleus Neutrons no charge 1 amu located inside the nucleus. +. Discovery of the Neutron. +.

By fausta
(95 views)

Bellringer

Bellringer

Bellringer. COMPLETE SENTENCES!!!! Where in an atom are the following subatomic particles located: proton, neutron, electron? What is the charge on the following subatomic particles: proton, neutron, electron?

By udell
(97 views)

THE ATOM

THE ATOM

THE ATOM. Around 400 B.C. a Greek philosopher, Democritus , proposed that all forms of matter were divisible into extremely small fundamental particles called atomos . (Greek for indivisible)

By alika
(142 views)

The History of the Atom

The History of the Atom

The History of the Atom. From Democritus to Today’s Modern Theory. Democritus. 400 BC Proposed that all matter is made up of atoms. Thought atoms were small, hard particles of different shapes and sizes. Coined the term ‘Atom’ From the Greek word meaning ‘Can not be divided.’.

By oriole
(101 views)

Chapter 5 Electrons in Atoms

Chapter 5 Electrons in Atoms

Chapter 5 Electrons in Atoms. 5.1 MODELS OF THE ATOM: 1803 – John Dalton – tiny indestructible particles with no internal structure 1897 – J.J. Thomson – electrons are embedded in a sphere of positive electrical charge – the “plum pudding model”

By theola
(86 views)

Democritus – 460 – 370 BC p. 101

Democritus – 460 – 370 BC p. 101

Democritus – 460 – 370 BC p. 101. Matter consisted of tiny particles “ atomos ” Ideas were wrong. John Dalton (1803) p. 102. Dalton’s Theory – Explains the Law of Conservation of Matter. Atoms are separated, combined or rearranged in a reaction, they are not created, destroyed or divided.

By fay
(111 views)

Chapter 4 “Atomic Structure”

Chapter 4 “Atomic Structure”

Chapter 4 “Atomic Structure”. Defining the Atom. The Greek philosopher Democritus (460 B.C. – 370 B.C .) was among the first to suggest the existence of atoms (from the Greek word “atomos”) He believed that atoms were indivisible and indestructible

By haruki
(72 views)

Chapter 4

Chapter 4

Atomic Structure. Chapter 4. Section 1. Defining the Atom. Section 1 – Learning Targets. 4.1.1 – I can describe Democritus’ ideas about atoms. 4.1.2 – I can explain Dalton’s atomic theory. 4.1.3 – I can identify what instrument is used to observe individual atoms. Early Models of the Atom.

By mora
(94 views)

Subatomic Particles

Subatomic Particles

Subatomic Particles. An atom is the smallest part of an element that retains the same chemical properties as the element. The nucleus is the central part of an atom. It is made up of protons and neutrons and contains most of the atom’s mass.

By evette
(248 views)

reintroduction to Chemistry

reintroduction to Chemistry

reintroduction to Chemistry. Matter: Anything that has mass and volume. States of Matter. Physical Changes. Boiling point Melting point Freezing point Color Density. Properties that do not change the chemical nature of matter.

By hetal
(202 views)

Discovery of the Nucleus Protons and Neutrons

Discovery of the Nucleus Protons and Neutrons

Discovery of the Nucleus Protons and Neutrons. Who were they?. Ernest Rutherford is a physicist who won the N obel Prize for chemistry. He discovered the concept of radioactive half-life and theorized that atoms have their charge concentrated in a very small nucleus.

By saima
(155 views)

Chpt. 2: The Atom

Chpt. 2: The Atom

Chpt. 2: The Atom. History of the Atom Greek Philosophers (400BC): - first proposed that matter was composed of minute particles - believed that the tiny particles of which all matter was composed were so small that nothing smaller was possible

By lynne
(70 views)

Elements and Periodic Table

Elements and Periodic Table

Elements and Periodic Table. Chapter 3 Unit - Introduction to chemistry Mrs. Castro. Lesson 1 Pages 72 – 79. Introduction to Atoms. Introduction to atoms. Atomic Theory This is the theory that explain with details the component of the atoms and their organization.

By amos
(68 views)

Quanta to Quarks

Quanta to Quarks

Quanta to Quarks. Focus Area 3. The Nucleus. T ypically the nucleus is less than one ten-thousandth the size of the atom, the nucleus contains more that 99.9% of the mass of the atom.

By elana
(316 views)

Chapter 5 Sections 2 and 3

Chapter 5 Sections 2 and 3

Chapter 5 Sections 2 and 3. Structure of an atom nucleus - center of an atom -discovered by Ernest Rutherford in 1911 proton (p + ) -positively charged subatomic particle -found in the nucleus of an atom -discovered by Eugen Goldstein in 1886 -mass= 1.67 X 10 -24 g.

By arien
(82 views)

Scientific Quizzz…

Scientific Quizzz…

Scientific Quizzz…. Made By: Qian Ying LEE 8A. Rules. You are supposed to count how many questions you got wrong or right. NO Cheating!

By elias
(52 views)

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