Slide 1
... One important property of the noble gases is their inactivity. They are inactive because their outermost energy level is full. Because they do not readily combine with other elements to form compounds, the noble gases are called inert. The family of noble gases includes helium, neon, argon, ...
... One important property of the noble gases is their inactivity. They are inactive because their outermost energy level is full. Because they do not readily combine with other elements to form compounds, the noble gases are called inert. The family of noble gases includes helium, neon, argon, ...
physical earth science
... b. Suggests electrons move in pathways around the nucleus – like planets around the sun c. States that e- have certain amount of energy according to their orbit d. Gain or lose energy – move up or down energy levels e. Still accurate description today 2. Electrons act more like waves a. 1925 new mo ...
... b. Suggests electrons move in pathways around the nucleus – like planets around the sun c. States that e- have certain amount of energy according to their orbit d. Gain or lose energy – move up or down energy levels e. Still accurate description today 2. Electrons act more like waves a. 1925 new mo ...
Matter and Periodic Table Matter- anything that has mass and takes
... -If two atoms of the same element have different number of neutrons then it is an isotope. Atomic Mass = found on the periodic table = average of all isotopes masses ...
... -If two atoms of the same element have different number of neutrons then it is an isotope. Atomic Mass = found on the periodic table = average of all isotopes masses ...
Vocabulary and Section Summary
... Name ______________________________ Class___________________Date__________________ ...
... Name ______________________________ Class___________________Date__________________ ...
Chapter 2 Notes
... • Atoms of the various elements differ in number of subatomic particles • An element’s atomic number is the number of protons in its nucleus • An element’s mass number is the sum of protons plus neutrons in the nucleus • Atomic mass, the atom’s total mass, can be approximated by the mass number ...
... • Atoms of the various elements differ in number of subatomic particles • An element’s atomic number is the number of protons in its nucleus • An element’s mass number is the sum of protons plus neutrons in the nucleus • Atomic mass, the atom’s total mass, can be approximated by the mass number ...
Elements02
... 2. Each element has its own kind of atom. Atoms of the same element have the same mass. Atoms of different elements have different masses. 3. Compounds are created when atoms of different elements link to form compound atoms. Water is a compound because the two element of hydrogen and oxygen combine ...
... 2. Each element has its own kind of atom. Atoms of the same element have the same mass. Atoms of different elements have different masses. 3. Compounds are created when atoms of different elements link to form compound atoms. Water is a compound because the two element of hydrogen and oxygen combine ...
Groups of the Periodic Table
... measured without changing the make-up of the matter of the object (ex: colour, odor, texture, density, melting point, boiling point) • Chemical Property: Cannot be determined by simply viewing or touching the object; only becomes evident during a chemical reaction (ex: reactivity with other chemical ...
... measured without changing the make-up of the matter of the object (ex: colour, odor, texture, density, melting point, boiling point) • Chemical Property: Cannot be determined by simply viewing or touching the object; only becomes evident during a chemical reaction (ex: reactivity with other chemical ...
Test Review - Alvinisd.net
... 1. Which of John Dalton’s postulates are still considered to be true today? 2. Which of John Dalton’s postulates are NOT considered to be true today? 3. What was discovered in the cathode ray tube experiment? 4. What did Ernest Rutherford’s gold foil experiment discover? (actually 4 discoveries) 5. ...
... 1. Which of John Dalton’s postulates are still considered to be true today? 2. Which of John Dalton’s postulates are NOT considered to be true today? 3. What was discovered in the cathode ray tube experiment? 4. What did Ernest Rutherford’s gold foil experiment discover? (actually 4 discoveries) 5. ...
Atomic History
... • Most of the alpha particles passed straight through the foil, some were slightly deflected, while only a few were deflected by 90° or more • Results indicated that the positive charge was small and dense and the electrons were spread out in empty space. • *Rutherford could not explain how the e ...
... • Most of the alpha particles passed straight through the foil, some were slightly deflected, while only a few were deflected by 90° or more • Results indicated that the positive charge was small and dense and the electrons were spread out in empty space. • *Rutherford could not explain how the e ...
Ch. 2. Atomic Structure and Periodic Table
... Atomic number: The number of protons in the nucleus of an atom. Isotopes: Atoms of the same element with different numbers of neutrons. *Isotopes are identified by including the mass number with the element name. Ex: Carbon 14, Carbon 12 Average Atomic Mass: An estimate of the mass of an element’s a ...
... Atomic number: The number of protons in the nucleus of an atom. Isotopes: Atoms of the same element with different numbers of neutrons. *Isotopes are identified by including the mass number with the element name. Ex: Carbon 14, Carbon 12 Average Atomic Mass: An estimate of the mass of an element’s a ...
Chapter 4 Study Guide Section 4.1 What was Dalton`s Atomic
... neutrons are called isotopes. Section 4.3 1. There are 2 orbitals in the s shell, 6 orbitals in the p shell, 10 orbitals in the d shell, and 14 orbitals in the f shell. ...
... neutrons are called isotopes. Section 4.3 1. There are 2 orbitals in the s shell, 6 orbitals in the p shell, 10 orbitals in the d shell, and 14 orbitals in the f shell. ...
Chapter 7
... •Dmitri Mendeleev and Lothar Meyer (~1869) independently came to the same conclusion about how elements should be grouped in the periodic table. •Henry Moseley (1913) developed the concept of atomic numbers (the number of protons in the nucleus of an atom) ...
... •Dmitri Mendeleev and Lothar Meyer (~1869) independently came to the same conclusion about how elements should be grouped in the periodic table. •Henry Moseley (1913) developed the concept of atomic numbers (the number of protons in the nucleus of an atom) ...
Basic structure of atoms
... Electron cloud • Electrons move very rapidly in complicated paths called orbitals. • Because of this motion, they appear to form a cloud. – Negative charge -1 – Mass: 9.1 x10-28 grams – Symbols include e-, -1e0 ...
... Electron cloud • Electrons move very rapidly in complicated paths called orbitals. • Because of this motion, they appear to form a cloud. – Negative charge -1 – Mass: 9.1 x10-28 grams – Symbols include e-, -1e0 ...
Atomic Theory NS
... 7. Protons (___) have a charge of ______ and a mass of 1.673 x 10-24g. 8. Neutrons (no) have ______ charge and have the same mass as a ___________________ 9. ___________________ (____) have a charge of _____ and a mass of 9.11 x 10 -28g. 10. _____________________________ & _______________________ ar ...
... 7. Protons (___) have a charge of ______ and a mass of 1.673 x 10-24g. 8. Neutrons (no) have ______ charge and have the same mass as a ___________________ 9. ___________________ (____) have a charge of _____ and a mass of 9.11 x 10 -28g. 10. _____________________________ & _______________________ ar ...
Models of the Atom a Historical Perspective
... • Louis de Broglie (electron has wave properties) – Although they are particles, electrons also act like waves ...
... • Louis de Broglie (electron has wave properties) – Although they are particles, electrons also act like waves ...
Ch 1.1 ppt
... • Certain chemical properties were repeated regularly. • These properties were related to the sum of the protons and neutrons in an atom. ...
... • Certain chemical properties were repeated regularly. • These properties were related to the sum of the protons and neutrons in an atom. ...
SNC 1D chem chpt2
... to represent different chemicals are the same in each language, although we do call elements different names. We use a standard atomic notation to represent elements. Mass # is written above, atomic # below and the symbol in large letters to the left. ...
... to represent different chemicals are the same in each language, although we do call elements different names. We use a standard atomic notation to represent elements. Mass # is written above, atomic # below and the symbol in large letters to the left. ...
Chapter 7 Periodic Properties of the Elements
... •Dmitri Mendeleev and Lothar Meyer (~1869) independently came to the same conclusion about how elements should be grouped in the periodic table. •Henry Moseley (1913) developed the concept of atomic numbers (the number of protons in the nucleus of an atom) ...
... •Dmitri Mendeleev and Lothar Meyer (~1869) independently came to the same conclusion about how elements should be grouped in the periodic table. •Henry Moseley (1913) developed the concept of atomic numbers (the number of protons in the nucleus of an atom) ...