The History of the Atom Carousel Who-What-When
... conflicting theories of matter. Aristotle believed in the then current thought that there were four elements: earth, air, fire, and water. To this he added ‘Aether’ meaning outer space and the planets. Democritus believed matter was composed of many tiny pieces and the smallest were indivisible. He ...
... conflicting theories of matter. Aristotle believed in the then current thought that there were four elements: earth, air, fire, and water. To this he added ‘Aether’ meaning outer space and the planets. Democritus believed matter was composed of many tiny pieces and the smallest were indivisible. He ...
1.1 to 1.4
... contain only one type of atom. Ex. C (carbon) and Al (aluminum) Molecular elements - whose molecules consist of more than one atom of the same element. Ex. H2(g), S8(s). ...
... contain only one type of atom. Ex. C (carbon) and Al (aluminum) Molecular elements - whose molecules consist of more than one atom of the same element. Ex. H2(g), S8(s). ...
Chem 400 Chem 150 REVIEW SHEET Amanda R
... o Protons, electrons and neutrons make up an atom o Atoms make up molecules, all matter is made of atoms o Protons and neutrons are in the nucleus, and electrons are buzzing outside the nucleus around the nucleus in orbitals o # of protons defines an element, # of protons = atomic # o # of neutrons ...
... o Protons, electrons and neutrons make up an atom o Atoms make up molecules, all matter is made of atoms o Protons and neutrons are in the nucleus, and electrons are buzzing outside the nucleus around the nucleus in orbitals o # of protons defines an element, # of protons = atomic # o # of neutrons ...
Chapter 4 Study Guide
... Know definitions for the following vocabulary words: matter spectral line atom energy level nucleus electron cloud proton electromagnetic spectrum neutron charge electron Thomson’s atomic model proportion Rutherford’s atomic model Democritus Bohr’s atomic model Dalton element Lavoisier atomic number ...
... Know definitions for the following vocabulary words: matter spectral line atom energy level nucleus electron cloud proton electromagnetic spectrum neutron charge electron Thomson’s atomic model proportion Rutherford’s atomic model Democritus Bohr’s atomic model Dalton element Lavoisier atomic number ...
Chapter 10 Power Point - Biloxi Public Schools
... properties or characteristics. ***There were some gaps in masses so he placed question marks in their spots. Later, elements were discovered to fill in these gaps. His predictions about elements, their masses & properties proved to be true.*** Henry Moseley arranged the elements by increasing atomic ...
... properties or characteristics. ***There were some gaps in masses so he placed question marks in their spots. Later, elements were discovered to fill in these gaps. His predictions about elements, their masses & properties proved to be true.*** Henry Moseley arranged the elements by increasing atomic ...
Document
... As Tiny as atoms are, ___________, ___________, and ___________ are even smaller. The data in ____________ show that _______________________________ have about the same _________. The masses of an atom’s electrons are negligible (doesn’t count) compared to an __________________. An atom’s __________ ...
... As Tiny as atoms are, ___________, ___________, and ___________ are even smaller. The data in ____________ show that _______________________________ have about the same _________. The masses of an atom’s electrons are negligible (doesn’t count) compared to an __________________. An atom’s __________ ...
RAD 354 Chapt 3 Structure of Matter
... Varied #’s of mass# & atomic# • Isotope = same # of protons but different # of neutrons • Isobar = different # of protons and neutrons BUT same TOTAL number of nucleons • Isotones = same # of neutrons BUT different # of protons • Isomer = same atomic number and same atomic mass number- BUT exist at ...
... Varied #’s of mass# & atomic# • Isotope = same # of protons but different # of neutrons • Isobar = different # of protons and neutrons BUT same TOTAL number of nucleons • Isotones = same # of neutrons BUT different # of protons • Isomer = same atomic number and same atomic mass number- BUT exist at ...
ATOMS AND THE PERIODIC TABLE chapter three
... SEMICONDUCTORS (METALOIDS) The elements that are between the metals and nonmetals are known as: SEMICONDUCTORS (METALOIDS) They may exhibit metallic and nonmetallic properties. B Si Ge ...
... SEMICONDUCTORS (METALOIDS) The elements that are between the metals and nonmetals are known as: SEMICONDUCTORS (METALOIDS) They may exhibit metallic and nonmetallic properties. B Si Ge ...
Chapter 1 D Study Guide Answers
... Most elements on the periodic table are _metals__________ The rows of the periodic table are called ___periods_____ Atomic size generally __increases___from the top of a group to the bottom When a _radioactive_ _atom_ produces a particle and energy, it can change the # of protons in the nucleus whic ...
... Most elements on the periodic table are _metals__________ The rows of the periodic table are called ___periods_____ Atomic size generally __increases___from the top of a group to the bottom When a _radioactive_ _atom_ produces a particle and energy, it can change the # of protons in the nucleus whic ...
6.1 Atoms and Elements
... 2. Elements of the same column (group) of the periodic table have similar properties. 3. Atoms consist of protons and neutrons in the central core surrounded by electrons. Parts of the Atom Proton: a positively charged particle in an atom. Neutron: a particle in an atom that has no electrical charge ...
... 2. Elements of the same column (group) of the periodic table have similar properties. 3. Atoms consist of protons and neutrons in the central core surrounded by electrons. Parts of the Atom Proton: a positively charged particle in an atom. Neutron: a particle in an atom that has no electrical charge ...
Chemistry I Lecture Notes – Atomic Structure
... Atoms of different elements can combine in simple whole number ratios to form compounds. Atoms are simply just rearranged in chemical reactions. Law of Definite Proportions Atoms combine in simple whole number ratios to form compounds. Law of Multiple Proportions Atoms of the same two (or mo ...
... Atoms of different elements can combine in simple whole number ratios to form compounds. Atoms are simply just rearranged in chemical reactions. Law of Definite Proportions Atoms combine in simple whole number ratios to form compounds. Law of Multiple Proportions Atoms of the same two (or mo ...
Extra Credit Test Review
... 29. How is the bonding of Cl2 different from the bonding in NaCl? Cl2 is a diatomic / covalent bond whereas NaCl is an ionic bond 30. Explain how Helium can be in Group 18, but doesn’t have 8 valence electrons? Helium only has 2 electrons, so they will fill up the first energy level/shell and theref ...
... 29. How is the bonding of Cl2 different from the bonding in NaCl? Cl2 is a diatomic / covalent bond whereas NaCl is an ionic bond 30. Explain how Helium can be in Group 18, but doesn’t have 8 valence electrons? Helium only has 2 electrons, so they will fill up the first energy level/shell and theref ...
Chapter 8
... Electron affinity is the negative of the energy change that occurs when an electron is accepted by an atom in the gaseous state to form an anion. X (g) + e- ...
... Electron affinity is the negative of the energy change that occurs when an electron is accepted by an atom in the gaseous state to form an anion. X (g) + e- ...
COS 1.0, 1.1, 1.2, 1.3
... determines atom’s chemical properties participate in chemical bonding Every atom has between one and eight ...
... determines atom’s chemical properties participate in chemical bonding Every atom has between one and eight ...
Physical Science Chapter 3 Test
... 10. The order of elements in the periodic table is based on the number of ____________________ in the nucleus. 11. The ____________________ states that when elements are listed in order of atomic number, similarities in their properties will emerge in a regular pattern. 12. Because atoms of elements ...
... 10. The order of elements in the periodic table is based on the number of ____________________ in the nucleus. 11. The ____________________ states that when elements are listed in order of atomic number, similarities in their properties will emerge in a regular pattern. 12. Because atoms of elements ...
chapter 7 – cyu
... 1. Uranium, Polonium, Radium 2. Searching for other radioactive elements, exploring the composition of the rays, using the rays to probe atomic structure. 3. The spectrum of hydrogen atoms is not continuous. Bohr concluded that if an electron had more energy, then it circled the nucleus at a greater ...
... 1. Uranium, Polonium, Radium 2. Searching for other radioactive elements, exploring the composition of the rays, using the rays to probe atomic structure. 3. The spectrum of hydrogen atoms is not continuous. Bohr concluded that if an electron had more energy, then it circled the nucleus at a greater ...
Chapter 2: Elements are the building blocks of matter
... • Organizes the elements according to their physical and chemical properties • The one we use was developed by Dmitri Mendeleev in 1867 ...
... • Organizes the elements according to their physical and chemical properties • The one we use was developed by Dmitri Mendeleev in 1867 ...
Atomic Crossword Name: Period: ____
... 7. Particle with no charge 8. Greek thinker who first coined the term "atomos" 11. A _____________ electron is in the outermost shell of an atom 12. Formed when atoms share electrons 14. Has a different number of neutrons than normal 15. The splitting of an atomic nucleus (usually with heavy element ...
... 7. Particle with no charge 8. Greek thinker who first coined the term "atomos" 11. A _____________ electron is in the outermost shell of an atom 12. Formed when atoms share electrons 14. Has a different number of neutrons than normal 15. The splitting of an atomic nucleus (usually with heavy element ...
Atomic Structure Test Review 2016
... You may need to check your notes for some definitions. Remember, resources are on ItsLearning. ...
... You may need to check your notes for some definitions. Remember, resources are on ItsLearning. ...
Periodic table
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons in the nucleus), electron configurations, and recurring chemical properties. The table also shows four rectangular blocks: s-, p- d- and f-block. In general, within one row (period) the elements are metals on the lefthand side, and non-metals on the righthand side.The rows of the table are called periods; the columns are called groups. Six groups (columns) have names as well as numbers: for example, group 17 elements are the halogens; and group 18, the noble gases. The periodic table can be used to derive relationships between the properties of the elements, and predict the properties of new elements yet to be discovered or synthesized. The periodic table provides a useful framework for analyzing chemical behavior, and is widely used in chemistry and other sciences.Although precursors exist, Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table. Most of his predictions were proved correct when the elements in question were subsequently discovered. Mendeleev's periodic table has since been expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behavior.All elements from atomic numbers 1 (hydrogen) to 118 (ununoctium) have been discovered or reportedly synthesized, with elements 113, 115, 117, and 118 having yet to be confirmed. The first 94 elements exist naturally, although some are found only in trace amounts and were synthesized in laboratories before being found in nature. Elements with atomic numbers from 95 to 118 have only been synthesized in laboratories. It has been shown that einsteinium and fermium once occurred in nature but currently do not. Synthesis of elements having higher atomic numbers is being pursued. Numerous synthetic radionuclides of naturally occurring elements have also been produced in laboratories.