PreAP Chemistry
... Main Idea: Elements are organized into different _______________ in the periodic table according to their _______________ _______________. Organizing Elements by Electron Configuration • Recall electrons in the highest principal energy level are called _______________ electrons. • All ______________ ...
... Main Idea: Elements are organized into different _______________ in the periodic table according to their _______________ _______________. Organizing Elements by Electron Configuration • Recall electrons in the highest principal energy level are called _______________ electrons. • All ______________ ...
8th-interlude-for-atoms - Epiphany Catholic School
... 1. A has 24 protons & 25 neutrons. B has 24 protons & 26 neutrons. Are A & B different elements or isotopes? 2. C has an atomic number of 12 & mass number of 24. D has an atomic number of 13 & a mass number of 26. Are C & D different elements or isotopes? ...
... 1. A has 24 protons & 25 neutrons. B has 24 protons & 26 neutrons. Are A & B different elements or isotopes? 2. C has an atomic number of 12 & mass number of 24. D has an atomic number of 13 & a mass number of 26. Are C & D different elements or isotopes? ...
The Basics of Atomic Structure
... • amu is shorthand for “Atomic Mass Unit (u)” Atomic Mass Units are the units used to express atomic and molecular units. One atomic mass unit (u) is roughly equal to the mass of one proton or one neutron. In grams, one atomic mass unit (u) is equal to: ...
... • amu is shorthand for “Atomic Mass Unit (u)” Atomic Mass Units are the units used to express atomic and molecular units. One atomic mass unit (u) is roughly equal to the mass of one proton or one neutron. In grams, one atomic mass unit (u) is equal to: ...
Ch. 5 Outline Notes
... A. Early Models of the Atom 1. ____________________ – 4th century BC – world made up of empty space and tiny particles called _______________ (atomos) ‘indivisible’ a. Hypothesized _________________ using experiments B. __________________ Atomic Theory 1. All matter is made of ________________ 2. At ...
... A. Early Models of the Atom 1. ____________________ – 4th century BC – world made up of empty space and tiny particles called _______________ (atomos) ‘indivisible’ a. Hypothesized _________________ using experiments B. __________________ Atomic Theory 1. All matter is made of ________________ 2. At ...
Electron Configuration and Periodic Properties
... atoms of A lose electrons easily. • Element A is most likely to be an s-block metal because ionization energies increase across the periods. • Element B has a very high ionization energy which means that atoms of B have difficulty losing electrons. • Element B would most likely lie at the end of a p ...
... atoms of A lose electrons easily. • Element A is most likely to be an s-block metal because ionization energies increase across the periods. • Element B has a very high ionization energy which means that atoms of B have difficulty losing electrons. • Element B would most likely lie at the end of a p ...
The Periodic Table - Mrs Molchany`s Webpage
... across the period. More protons are added going across the period. The protons have a stronger pull on the electrons. The strong attractive forces between the protons and the outermost (valence) electrons shrinks the orbitals and makes the atoms smaller. Generally speaking, effective nuclear charge ...
... across the period. More protons are added going across the period. The protons have a stronger pull on the electrons. The strong attractive forces between the protons and the outermost (valence) electrons shrinks the orbitals and makes the atoms smaller. Generally speaking, effective nuclear charge ...
ATOMIC STRUCTURE
... Needless to say that even the Bohr model was inadequate. It became obvious that electrons are not “orbiting”, but instead occupying precisely defined sections of space, called orbital. Anywhere within a particular orbital an electron has the same energy, regardless how far from the nucleus it happen ...
... Needless to say that even the Bohr model was inadequate. It became obvious that electrons are not “orbiting”, but instead occupying precisely defined sections of space, called orbital. Anywhere within a particular orbital an electron has the same energy, regardless how far from the nucleus it happen ...
Chocolate Challenge - Waterford Public Schools
... Protons determine element’s identity # of protons is unique for each element Electrons determine element’s chemical properties Neutrons act as a “glue” for the protons to minimize charge repulsions ...
... Protons determine element’s identity # of protons is unique for each element Electrons determine element’s chemical properties Neutrons act as a “glue” for the protons to minimize charge repulsions ...
Chemistry in Focus 3rd edition Tro
... • The atomic number, Z, represents the number of protons in the nucleus of an atom. • The charge of a proton is assigned numerical value of +1. • Protons constitute a significant part of the mass of an atom. – Mass of a proton is 1.0 amu ...
... • The atomic number, Z, represents the number of protons in the nucleus of an atom. • The charge of a proton is assigned numerical value of +1. • Protons constitute a significant part of the mass of an atom. – Mass of a proton is 1.0 amu ...
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) ...
The Periodic Table - Academic Resources at Missouri Western
... Number of electrons in the outer orbit Groups A Group (Representative elements) B Group (Transition elements) Group VIIIA Noble or inert gases ...
... Number of electrons in the outer orbit Groups A Group (Representative elements) B Group (Transition elements) Group VIIIA Noble or inert gases ...
Chapter 4: Introduction to Earth Chemistry Section 1 Notes
... Based on similarities in their _____________ properties, elements on the periodic table are arranged in columns, which are called ___________. An atom’s chemical properties are largely determined _________________________________________ _____________________________. These electrons are called ____ ...
... Based on similarities in their _____________ properties, elements on the periodic table are arranged in columns, which are called ___________. An atom’s chemical properties are largely determined _________________________________________ _____________________________. These electrons are called ____ ...
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 ...
Periodic Table
... –Included elements Valence # (bonding power) •How many e- the atom can lose or gain when bonding •Pattern appeared - 1234321 ...
... –Included elements Valence # (bonding power) •How many e- the atom can lose or gain when bonding •Pattern appeared - 1234321 ...
Section 3
... •Atoms of the same element are exactly alike. •Atoms of different elements can join to form molecules. •His theory was accepted because there was evidence to support it. 4 parts of an atom •Nucleus – is center of an atom that carries a positive charge. It contains both protons & neutrons. The electr ...
... •Atoms of the same element are exactly alike. •Atoms of different elements can join to form molecules. •His theory was accepted because there was evidence to support it. 4 parts of an atom •Nucleus – is center of an atom that carries a positive charge. It contains both protons & neutrons. The electr ...
Name: Midterm Review (Part II) Fill in the blanks (Chapter 6.1 – 6.3
... In which group in the periodic table are the most reactive metals? In which group in the periodic table are the most reactive nonmetals? Describe the trends in reactivity of nonmetals within groups ((Increase/Decrease down a group?) Is Bromine is more/less reactive than Chlorine? List three properti ...
... In which group in the periodic table are the most reactive metals? In which group in the periodic table are the most reactive nonmetals? Describe the trends in reactivity of nonmetals within groups ((Increase/Decrease down a group?) Is Bromine is more/less reactive than Chlorine? List three properti ...
Chapter 10 Test A
... d. a nuclear fission reaction to split a nucleus in half. ____ 21. A way of organizing the elements based on their chemical properties is the: a. energy level. b. periodic table. c. nucleus. d. isotope. ____ 22. A nuclear chain reaction can occur when: a. one atom of uranium hits another atom of ura ...
... d. a nuclear fission reaction to split a nucleus in half. ____ 21. A way of organizing the elements based on their chemical properties is the: a. energy level. b. periodic table. c. nucleus. d. isotope. ____ 22. A nuclear chain reaction can occur when: a. one atom of uranium hits another atom of ura ...
Note - Science 10
... atom. Each shell holds a maximum number of electrons (2, 8, 8, 18, 18) Electrons in the outermost shell are called valence electrons If the valence shell is full = the atom is stable If the valence shell is not full = the atom is not stable Note: Think of the shells as being 3D like spheres, ...
... atom. Each shell holds a maximum number of electrons (2, 8, 8, 18, 18) Electrons in the outermost shell are called valence electrons If the valence shell is full = the atom is stable If the valence shell is not full = the atom is not stable Note: Think of the shells as being 3D like spheres, ...
Chapter 4 Packet Chem
... An electron in an atom can move from one ___________________ to another when the atom ___________________ or ___________________ energy. Scientists use the ______________________ model to describe the possible location of atoms around the nucleus. An electron cloud is a good ___________________ of h ...
... An electron in an atom can move from one ___________________ to another when the atom ___________________ or ___________________ energy. Scientists use the ______________________ model to describe the possible location of atoms around the nucleus. An electron cloud is a good ___________________ of h ...
Atoms and the Periodic Table
... Atoms are tiny units that determine properties of all matter. Democritus was the first to suggest that the universe was made of atoms, but couldn’t provide evidence to prove it! 1808 John Dalton proposed the atomic theory with evidence to support it ...
... Atoms are tiny units that determine properties of all matter. Democritus was the first to suggest that the universe was made of atoms, but couldn’t provide evidence to prove it! 1808 John Dalton proposed the atomic theory with evidence to support it ...
Ch 18 - Atoms and Elements
... Calculate the numbers of protons and neutrons in each stable isotope of an element. ...
... Calculate the numbers of protons and neutrons in each stable isotope of an element. ...
Chapter 18: Atoms and Elements
... Use indirect measurement to determine the radius of a circle. Build models of atoms. Research one of the historical atomic models. Understand how atoms of each element differ. Describe the forces that hold an atom together. Use the concept of electron shells to arrange electrons in atomic ...
... Use indirect measurement to determine the radius of a circle. Build models of atoms. Research one of the historical atomic models. Understand how atoms of each element differ. Describe the forces that hold an atom together. Use the concept of electron shells to arrange electrons in atomic ...
Modern Atomic Theory and The Periodic Table
... Classification of Elements The Periodic Table Revisited. –Russian chemist __________________________ introduced the most successful arrangement of the elements to date in 1871. –Vertical rows were arranged by ______________________________. –Horizontal rows were arranged by ________________________ ...
... Classification of Elements The Periodic Table Revisited. –Russian chemist __________________________ introduced the most successful arrangement of the elements to date in 1871. –Vertical rows were arranged by ______________________________. –Horizontal rows were arranged by ________________________ ...