Unit 2: Exploring Matter - Fort McMurray Composite High School
... sodium and potassium have similar properties so he placed them in the same family or vertical row) - He left blanks in the table where he predicted elements should be and predicted what their properties would be, based on where they were on his table - After the development of atomic theory, the per ...
... sodium and potassium have similar properties so he placed them in the same family or vertical row) - He left blanks in the table where he predicted elements should be and predicted what their properties would be, based on where they were on his table - After the development of atomic theory, the per ...
Atoms, Molecules, Compounds, Elements, and Mixtures
... Electrons • Electrons orbit around an atom. In this picture, they are the small yellow bits. • They have a negative charge. • They are lighter than protons or neutrons. • The number of protons=number of electrons in a neutral atom ...
... Electrons • Electrons orbit around an atom. In this picture, they are the small yellow bits. • They have a negative charge. • They are lighter than protons or neutrons. • The number of protons=number of electrons in a neutral atom ...
Script of atoms video
... # of protons gives identity of the element (atomic number) So what is helium’s atomic number? (fig. 2.3) Protons + Neutrons gives atomic mass So what is the atomic mass of helium? (fig. 2.3) For uncharged (electrically neutral) atoms: # of protons = # of electrons Re-cap Protons and neutrons are in ...
... # of protons gives identity of the element (atomic number) So what is helium’s atomic number? (fig. 2.3) Protons + Neutrons gives atomic mass So what is the atomic mass of helium? (fig. 2.3) For uncharged (electrically neutral) atoms: # of protons = # of electrons Re-cap Protons and neutrons are in ...
Unit 2 Notes
... and the orbitals gain energy the _______________ they get from the nucleus How the Bohr model relates to light • When an atom is at rest, each electron lies in its _____________________________________________ • Energy is __________________to an atom, the electrons ____________ it and jump to _____ ...
... and the orbitals gain energy the _______________ they get from the nucleus How the Bohr model relates to light • When an atom is at rest, each electron lies in its _____________________________________________ • Energy is __________________to an atom, the electrons ____________ it and jump to _____ ...
CHEMISTRY
... simplest part of a compound that retains all of the properties of the substance and exists in a free state • Some molecules are large and complex ...
... simplest part of a compound that retains all of the properties of the substance and exists in a free state • Some molecules are large and complex ...
Review Questions: Name Period 1. The atom (smallest unit of an
... 18. In the Bohr model for helium pictured above, the 2 white circles represent electrons. Which particles are in the center of this atomic model ...
... 18. In the Bohr model for helium pictured above, the 2 white circles represent electrons. Which particles are in the center of this atomic model ...
Exam #2 Review
... Atomic Model History – MAKE SURE YOU CAN MATCH EACH SCIENTIST TO HIS MODEL!! 1. Draw and name each scientist’s model of the atom: a. Dalton Billiard Ball Model ...
... Atomic Model History – MAKE SURE YOU CAN MATCH EACH SCIENTIST TO HIS MODEL!! 1. Draw and name each scientist’s model of the atom: a. Dalton Billiard Ball Model ...
Chapter 11 Modern Atomic Theory
... Orbital DiagramsAn orbital is a box; an electron is represented by an arrow, one up and one down (indicates opposite spins). No more than 2 arrows can be in a box. S orbital has 1 box; p has 3; d has 5; f has 7. Example 11.2,, p. 342- write the complete electron configurations and orbital diagrams f ...
... Orbital DiagramsAn orbital is a box; an electron is represented by an arrow, one up and one down (indicates opposite spins). No more than 2 arrows can be in a box. S orbital has 1 box; p has 3; d has 5; f has 7. Example 11.2,, p. 342- write the complete electron configurations and orbital diagrams f ...
Answers to practice questions
... _____ 71. Why is the radius of a positive ion always less than the radius of its neutral atom? A) the nucleus pulls the remaining electrons in closer B) the number of principal energy levels is always reduced C) the atomic orbitals contract all by themselves D) electron speeds are reduced _____72. ...
... _____ 71. Why is the radius of a positive ion always less than the radius of its neutral atom? A) the nucleus pulls the remaining electrons in closer B) the number of principal energy levels is always reduced C) the atomic orbitals contract all by themselves D) electron speeds are reduced _____72. ...
Atoms and Elements - Dublin City Schools
... matter that RETAINS PROPERTIES. • 2. All atoms of an element are the same. • 3. Atoms of different elements can join to form compounds. ...
... matter that RETAINS PROPERTIES. • 2. All atoms of an element are the same. • 3. Atoms of different elements can join to form compounds. ...
Chap 2.1 Notes - Nature of Matter
... around nucleus where electrons travel. Blue (-) : electrons ...
... around nucleus where electrons travel. Blue (-) : electrons ...
ANSWERS Using Key Terms Understanding Key Ideas
... tors, such as the one below, are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ...
... tors, such as the one below, are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ...
Chapter 4 guided notes (CP)
... Chapter 4: Atomic Structure Laboratory Chemistry You cannot see them, yet they make up everything… THE ATOM ...
... Chapter 4: Atomic Structure Laboratory Chemistry You cannot see them, yet they make up everything… THE ATOM ...
PowerPoint - De Anza College
... •An element is a pure substance that cannot be broken down into simpler substances by a chemical reaction. •Each element is identified by a one- or two-letter symbol. •Elements are arranged in the periodic table. •The position of an element in the periodic table tells us much about its chemical prop ...
... •An element is a pure substance that cannot be broken down into simpler substances by a chemical reaction. •Each element is identified by a one- or two-letter symbol. •Elements are arranged in the periodic table. •The position of an element in the periodic table tells us much about its chemical prop ...
Exam #2 Review
... Atomic Model History – MAKE SURE YOU CAN MATCH EACH SCIENTIST TO HIS MODEL!! 1. Draw and name each scientist’s model of the atom: a. Dalton Billiard Ball Model ...
... Atomic Model History – MAKE SURE YOU CAN MATCH EACH SCIENTIST TO HIS MODEL!! 1. Draw and name each scientist’s model of the atom: a. Dalton Billiard Ball Model ...
History of Atom
... d. There are as many kinds of atoms as there are elements e. Atoms of one element can’t be converted into another f. Atoms in chemical reactions are neither created or destroyed; merely rearranged g. Law of multiple proportions which describes how atoms combine to make different comp ...
... d. There are as many kinds of atoms as there are elements e. Atoms of one element can’t be converted into another f. Atoms in chemical reactions are neither created or destroyed; merely rearranged g. Law of multiple proportions which describes how atoms combine to make different comp ...
Physical Properties
... Atomic Model – A theory proposed to explain why elements differ from each other and from nonelements. Dalton’s Atomic Model - 1808 - Matter is made up of atoms, particles to small to be seen - Each element had its own kind of atom, with its own particular mass - Compounds are made when atoms of diff ...
... Atomic Model – A theory proposed to explain why elements differ from each other and from nonelements. Dalton’s Atomic Model - 1808 - Matter is made up of atoms, particles to small to be seen - Each element had its own kind of atom, with its own particular mass - Compounds are made when atoms of diff ...
Worksheet 4 - Periodic Trends A number of physical and chemical
... A number of physical and chemical properties of elements can be predicted from their position in the Periodic Table. Among these properties are Ionization Energy, Electron Affinity and Atomic/ Ionic Radii. These properties all involve the outer shell (valence) electrons as well as the inner shell (s ...
... A number of physical and chemical properties of elements can be predicted from their position in the Periodic Table. Among these properties are Ionization Energy, Electron Affinity and Atomic/ Ionic Radii. These properties all involve the outer shell (valence) electrons as well as the inner shell (s ...
protons and neutrons
... Most of the particles passed right through A few particles were deflected VERY FEW were greatly deflected ...
... Most of the particles passed right through A few particles were deflected VERY FEW were greatly deflected ...