1A-2 The Atom – Building Blocks of Matter
... The nucleus also contains almost all of the atoms mass (see Rutherford), which is comprised of protons and neutral particles called neutrons. The atomic mass (A) is the sum of the number of protons and neutrons in the atom’s nucleus, such that an atom can be symbolically expressed using its chem ...
... The nucleus also contains almost all of the atoms mass (see Rutherford), which is comprised of protons and neutral particles called neutrons. The atomic mass (A) is the sum of the number of protons and neutrons in the atom’s nucleus, such that an atom can be symbolically expressed using its chem ...
Evaluation for Topic 3
... Please fill in the following by ticking the boxes to show how well you have understood topic 3 ...
... Please fill in the following by ticking the boxes to show how well you have understood topic 3 ...
Slide 1
... • Today, we still use the term element, though in a different way. For example, we still believe that most substances are built up from simpler ones. ...
... • Today, we still use the term element, though in a different way. For example, we still believe that most substances are built up from simpler ones. ...
Intro to Chemistry
... Purest from of matter • Element • Element-Elements cannot be reduced to simpler substances by normal chemical means: each element has its own unique properties/characteristics ...
... Purest from of matter • Element • Element-Elements cannot be reduced to simpler substances by normal chemical means: each element has its own unique properties/characteristics ...
What is hydrogen peroxide?
... substance, said to be capable of turning base metals , especially lead , into gold; it was also sometimes believed to be an elixir of life , useful for rejuvenation and possibly ...
... substance, said to be capable of turning base metals , especially lead , into gold; it was also sometimes believed to be an elixir of life , useful for rejuvenation and possibly ...
Notes. - Net Start Class
... Metalloids: found along the stair-step line Synthetic: made in the laboratory and not yet found in nature – many of the Actinide and Lanthanide series and very large # elements. ...
... Metalloids: found along the stair-step line Synthetic: made in the laboratory and not yet found in nature – many of the Actinide and Lanthanide series and very large # elements. ...
atoms - Cloudfront.net
... Prize in chemistry for discovery of the electron. • The atom could be broken down into smaller particles. ...
... Prize in chemistry for discovery of the electron. • The atom could be broken down into smaller particles. ...
Click here to the handout.
... When a metal reacts it gives away electrons. When non-metals react they take electrons. The more reactive an atom is the more easily it can give these electrons away or steal them from another atom. Explain why the more reactive metals are found near the bottom of the periodic table whilst the more ...
... When a metal reacts it gives away electrons. When non-metals react they take electrons. The more reactive an atom is the more easily it can give these electrons away or steal them from another atom. Explain why the more reactive metals are found near the bottom of the periodic table whilst the more ...
Objective 4
... 1. Shell one has 2 electrons 2. Fill all shells with up to 8 electrons 3. Valance shell (outermost shell) - it needs 8 e- It will do almost anything to get more e- or give away extras e- ...
... 1. Shell one has 2 electrons 2. Fill all shells with up to 8 electrons 3. Valance shell (outermost shell) - it needs 8 e- It will do almost anything to get more e- or give away extras e- ...
Unit 5 Notes
... Radium-226 is a radioactive isotope that decays by releasing an alpha particle. Write a nuclear equation for the radioactive decay of radium-226. ...
... Radium-226 is a radioactive isotope that decays by releasing an alpha particle. Write a nuclear equation for the radioactive decay of radium-226. ...
The Periodic Table and Periodic Law
... • an indication of how strongly an atom’s nucleus holds onto its electrons ...
... • an indication of how strongly an atom’s nucleus holds onto its electrons ...
Atomic Structure Notes Packet
... Democritus (460 BC-370 BC): a Greek philosopher, believed that atoms were ____________ and_________________. His ideas were based on reasoning, not on experimentation. ...
... Democritus (460 BC-370 BC): a Greek philosopher, believed that atoms were ____________ and_________________. His ideas were based on reasoning, not on experimentation. ...
Central New Brunswick Academy
... Rutherford predicted the existence of a neutral particle similar in mass to a proton. In 1932 James Chadwick demonstrated that atomic nuclei must contain heavy neutral particles as well as positive particle in order to account for the atom’s mass. These were called neutrons. An atom, therefore is co ...
... Rutherford predicted the existence of a neutral particle similar in mass to a proton. In 1932 James Chadwick demonstrated that atomic nuclei must contain heavy neutral particles as well as positive particle in order to account for the atom’s mass. These were called neutrons. An atom, therefore is co ...
Element
... •consists of atoms of two or more different elements bound together •can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means) •has properties that are different from its component elements •always contains the same ratio of its component atoms. ...
... •consists of atoms of two or more different elements bound together •can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means) •has properties that are different from its component elements •always contains the same ratio of its component atoms. ...
Week 9 CCA Test Review
... This happens when an atom needs to give or take 1, 2, or 3 valence electrons to be stable ...
... This happens when an atom needs to give or take 1, 2, or 3 valence electrons to be stable ...
2 Types of Chemical Bonds
... 2 Types of Chemical Bonds 1. Ionic Bond – gain or lose valence electrons • This is a chemical bond formed by the attraction between positive (+) and negative (-) ions. What types of elements form Ionic Bonds? Metal elements: • Lose valence electrons to form (+) ions • Easier to lose than gain to ge ...
... 2 Types of Chemical Bonds 1. Ionic Bond – gain or lose valence electrons • This is a chemical bond formed by the attraction between positive (+) and negative (-) ions. What types of elements form Ionic Bonds? Metal elements: • Lose valence electrons to form (+) ions • Easier to lose than gain to ge ...
Semester 1 Final Review Powerpoint
... • The nucleus is located in the center of an atom. • The nucleus is positively charged and its volume is a very small % of the atom’s volume. • The nucleus contains protons and neutrons (they do not have to be equal in number). • The nuclear components are held together by the nuclear strong force. ...
... • The nucleus is located in the center of an atom. • The nucleus is positively charged and its volume is a very small % of the atom’s volume. • The nucleus contains protons and neutrons (they do not have to be equal in number). • The nuclear components are held together by the nuclear strong force. ...
Chapter 2
... Mass of electron = 1/1800 the mass of a proton or neutron Atomic mass number is a superscript to the left of the symbol ...
... Mass of electron = 1/1800 the mass of a proton or neutron Atomic mass number is a superscript to the left of the symbol ...
The evolution of Atomic Theory
... Henri Becquerel: Discovery of radioactivity 1900's Robert Millikan: Charge and mass of the electron Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...
... Henri Becquerel: Discovery of radioactivity 1900's Robert Millikan: Charge and mass of the electron Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...
Exploring Atoms Name Watch the “Atoms” movie at http://www
... 3. ________________ argued that everything in the world was made up of particles so small they could not be cut in half. He called these particles __________ from the Greek word “atomos”, which means ________________. 4. John _______________ said that atoms were the smallest part of an element that ...
... 3. ________________ argued that everything in the world was made up of particles so small they could not be cut in half. He called these particles __________ from the Greek word “atomos”, which means ________________. 4. John _______________ said that atoms were the smallest part of an element that ...
Na 2 O - s3.amazonaws.com
... Lise Meitner, (1878 -1968) was an Austrian, physicist who worked on radioactivity and nuclear physics. Meitner was part of the team that discovered nuclear fission (splitting an atom), an achievement for which her colleague Otto Hahn was awarded the Nobel Prize. Meitner is often mentioned as one of ...
... Lise Meitner, (1878 -1968) was an Austrian, physicist who worked on radioactivity and nuclear physics. Meitner was part of the team that discovered nuclear fission (splitting an atom), an achievement for which her colleague Otto Hahn was awarded the Nobel Prize. Meitner is often mentioned as one of ...
Chapter 2 – Elements
... electron has a weaker pull on it from the nucleus and therefore the electrons can move further away from the nucleus. Positive or metallic ions have radii that are smaller than their respective atoms for two reasons. When a metal loses electrons, it is losing its valence shell, and there are also fe ...
... electron has a weaker pull on it from the nucleus and therefore the electrons can move further away from the nucleus. Positive or metallic ions have radii that are smaller than their respective atoms for two reasons. When a metal loses electrons, it is losing its valence shell, and there are also fe ...
Physical Properties
... Remember: 1st shell – 2 electrons 2nd shell – 8 electrons 3rd shell – 8 electrons 4th shell – 18 electrons. ...
... Remember: 1st shell – 2 electrons 2nd shell – 8 electrons 3rd shell – 8 electrons 4th shell – 18 electrons. ...
3.2-3.3 Honors Notes - teacherstroh
... Niels Bohr: 1885-1962 Niels Bohr was a Danish physicist. He proposed a model of the atom that is similar to the model of the solar system. The electrons go around the nucleus like planets orbit around the sun. All electrons have their energy levels – a certain distance from the nucleus. Each energy ...
... Niels Bohr: 1885-1962 Niels Bohr was a Danish physicist. He proposed a model of the atom that is similar to the model of the solar system. The electrons go around the nucleus like planets orbit around the sun. All electrons have their energy levels – a certain distance from the nucleus. Each energy ...