General CHemistry Unit 2 Homework Notes
... A neutron has no charge and a relative mass of one. TOPIC TWO: COMPOUNDS & BONDING (PAGE 2) Subscripts in a chemical formula represent the relative number of each type of atom. The subscript always follows the symbol for the element. Example: In a water molecule, H2O, there are 2 hydrogen atoms and ...
... A neutron has no charge and a relative mass of one. TOPIC TWO: COMPOUNDS & BONDING (PAGE 2) Subscripts in a chemical formula represent the relative number of each type of atom. The subscript always follows the symbol for the element. Example: In a water molecule, H2O, there are 2 hydrogen atoms and ...
CLASS TEST NAME Class IIB Date ______ 1 .Which atomic
... 21. The electrons ______________________________________________________ around the nucleus in shells. The first shell, which is _______________________________ the nucleus, can hold ________electrons, whereas the 2nd and 3rd shells can hold ...
... 21. The electrons ______________________________________________________ around the nucleus in shells. The first shell, which is _______________________________ the nucleus, can hold ________electrons, whereas the 2nd and 3rd shells can hold ...
Minerals * Chemistry Review
... • An element is a substance that can not be made into simpler form by ordinary chemical means • The smallest unit is an atom ...
... • An element is a substance that can not be made into simpler form by ordinary chemical means • The smallest unit is an atom ...
the atomic theory
... 5. Neils Bohr 6. nucleus 7. proton 8. neutron 9. electron 10. shell 11. atomic number 12. atomic mass 13. Bohr Model 14. subatomic particle 15. isotope 16. empty bus seat rule B/ THE HISTORY OF THE ATOM: - John Dalton ...
... 5. Neils Bohr 6. nucleus 7. proton 8. neutron 9. electron 10. shell 11. atomic number 12. atomic mass 13. Bohr Model 14. subatomic particle 15. isotope 16. empty bus seat rule B/ THE HISTORY OF THE ATOM: - John Dalton ...
Chemistry Semester One Exam Review Name:
... 11. Write the electron configurations for the following elements. LithiumNitrogenZincBromineBarium12. What is the characteristic set of valence electrons for the following groups on the periodic table? Alkali metals (1); alkaline earth metals (2); halogens (17); noble gases (18) ...
... 11. Write the electron configurations for the following elements. LithiumNitrogenZincBromineBarium12. What is the characteristic set of valence electrons for the following groups on the periodic table? Alkali metals (1); alkaline earth metals (2); halogens (17); noble gases (18) ...
Periodic Table Quiz
... 11. Which element is in Period 4, Group 13? a) Na b) Al c) Ga d) K 12. How many electrons does Sulfur contain? a) 15 b) 16 c) 17 d) 18 13. Which elements below are ALL nonmetals? a) K, Ca, Sc b) Be, Br, Kr c) V, Cr, Mn d) Ne, Cl, Br ...
... 11. Which element is in Period 4, Group 13? a) Na b) Al c) Ga d) K 12. How many electrons does Sulfur contain? a) 15 b) 16 c) 17 d) 18 13. Which elements below are ALL nonmetals? a) K, Ca, Sc b) Be, Br, Kr c) V, Cr, Mn d) Ne, Cl, Br ...
Basic structure of atoms
... • Because of this motion, they appear to form a cloud. – Negative charge -1 – Mass: 9.1 x10-28 grams – Symbols include e-, -1e0 ...
... • Because of this motion, they appear to form a cloud. – Negative charge -1 – Mass: 9.1 x10-28 grams – Symbols include e-, -1e0 ...
Slide 1 - Effingham County Schools
... definition of an element as a substance that cannot be further broken down by ordinary chemical means. •It was also clear that elements combine to form compounds that have different physical and chemical properties than those of the elements that form them. Na + Cl → NaCl ...
... definition of an element as a substance that cannot be further broken down by ordinary chemical means. •It was also clear that elements combine to form compounds that have different physical and chemical properties than those of the elements that form them. Na + Cl → NaCl ...
Atoms and Molecules
... Key Concepts • Matter is made of atoms • Atoms are made of protons, neutrons and electrons • Elements are determined by the number of protons in the nucleus of the atom ...
... Key Concepts • Matter is made of atoms • Atoms are made of protons, neutrons and electrons • Elements are determined by the number of protons in the nucleus of the atom ...
Chapter 4 - Bakersfield College
... 2. All atoms of a given element have the same chemical properties. 3. Compounds are made up of two or more different kinds of atoms. A compound has the same relative numbers and types of atoms. ...
... 2. All atoms of a given element have the same chemical properties. 3. Compounds are made up of two or more different kinds of atoms. A compound has the same relative numbers and types of atoms. ...
The Atom Power point - Effingham County Schools
... definition of an element as a substance that cannot be further broken down by ordinary chemical means. •It was also clear that elements combine to form compounds that have different physical and chemical properties than those of the elements that form them. Na + Cl → NaCl ...
... definition of an element as a substance that cannot be further broken down by ordinary chemical means. •It was also clear that elements combine to form compounds that have different physical and chemical properties than those of the elements that form them. Na + Cl → NaCl ...
File - Mr. Gittermann
... • Electrons: Subatomic particle with a negative charge found in a certain region of space around the nucleus called the electron cloud; kept close to the atom due to the attraction between the opposite charges of the electron and proton ...
... • Electrons: Subatomic particle with a negative charge found in a certain region of space around the nucleus called the electron cloud; kept close to the atom due to the attraction between the opposite charges of the electron and proton ...
CHAPTER 3 sec 1 - Leon County Schools
... together (chemically combine) in whole-number ratios to form compounds. ...
... together (chemically combine) in whole-number ratios to form compounds. ...
What is Matter
... Has mass and volume (takes up space) Matter exists in some state or phase Most common are solid, liquid, gas. Others are non-newtonian, & plasma Matter is made up of atoms. The word ATOM comes from the Greek philosopher Democritus. It means “Indivisible” Atomic Theory: It is thought that atoms are m ...
... Has mass and volume (takes up space) Matter exists in some state or phase Most common are solid, liquid, gas. Others are non-newtonian, & plasma Matter is made up of atoms. The word ATOM comes from the Greek philosopher Democritus. It means “Indivisible” Atomic Theory: It is thought that atoms are m ...
What is Matter? Anything that can be smelled, tasted, touched… Has
... What is Matter? Anything that can be smelled, tasted, touched… Has and (takes up space) Matter exists in some or phase Most common are solid, liquid, gas. But non-newtonian, & plasma are often used Matter is made up of word ATOM comes from Democritus. It means “ ...
... What is Matter? Anything that can be smelled, tasted, touched… Has and (takes up space) Matter exists in some or phase Most common are solid, liquid, gas. But non-newtonian, & plasma are often used Matter is made up of word ATOM comes from Democritus. It means “ ...
Chapter 5
... nucleus, but is still mostly empty. •Electrons are in the cloud but can not be pinpointed at an exact time because they move so quickly. ...
... nucleus, but is still mostly empty. •Electrons are in the cloud but can not be pinpointed at an exact time because they move so quickly. ...
Name Period _____ Chemistry Review
... ____ 15. A substance that undergoes a chemical change is still the same substance after the change. _________________________ ____ 16. A(n) mixture is made of two or more substances—elements, compounds, or both—that are together in the same place but are not chemically combined. ____________________ ...
... ____ 15. A substance that undergoes a chemical change is still the same substance after the change. _________________________ ____ 16. A(n) mixture is made of two or more substances—elements, compounds, or both—that are together in the same place but are not chemically combined. ____________________ ...
Elements - Heartland
... Isotopes All atoms of one element have the same number of protons. But, they can have different numbers of neutrons, and hence, a different mass number. These different versions of atoms from one element are called isotopes. ...
... Isotopes All atoms of one element have the same number of protons. But, they can have different numbers of neutrons, and hence, a different mass number. These different versions of atoms from one element are called isotopes. ...
Atomic Structure
... Early Atomic Theory “Cosmic substance is made up of an infinite number of elements or particles ...
... Early Atomic Theory “Cosmic substance is made up of an infinite number of elements or particles ...
1. Of the three major categories of elements (metals, non
... 7. What is malleability? A property of metals, it is the ability to me flattened into sheets. 8. What is ductility? A property of metals, it is the ability to be drawn (pulled) into wires. 9. What are semiconductors? A property of metalloids, they conduct electricity when they are heated above room ...
... 7. What is malleability? A property of metals, it is the ability to me flattened into sheets. 8. What is ductility? A property of metals, it is the ability to be drawn (pulled) into wires. 9. What are semiconductors? A property of metalloids, they conduct electricity when they are heated above room ...
Chemistry Notes
... Know element and symbols for the following: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorous, sulfur, chlorine, argon, potassium, calcium, iron, copper, zinc, bromine, silver, iodine, gold, lead, mercury, radon. ...
... Know element and symbols for the following: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorous, sulfur, chlorine, argon, potassium, calcium, iron, copper, zinc, bromine, silver, iodine, gold, lead, mercury, radon. ...
Fire Up Your Atoms!!
... physical property of metals that lets them be flattened into thin sheets Draw it: ...
... physical property of metals that lets them be flattened into thin sheets Draw it: ...
Chemical element
A chemical element (or element) is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusively radioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up the Earth, while oxygen is the most common element in the crust of the earth.Chemical elements constitute approximately 15% of the matter in the universe: the remainder is dark matter, the composition of it is unknown, but it is not composed of chemical elements.The two lightest elements, hydrogen and helium were mostly formed in the Big Bang and are the most common elements in the universe. The next three elements (lithium, beryllium and boron) were formed mostly by cosmic ray spallation, and are thus more rare than those that follow. Formation of elements with from six to twenty six protons occurred and continues to occur in main sequence stars via stellar nucleosynthesis. The high abundance of oxygen, silicon, and iron on Earth reflects their common production in such stars. Elements with greater than twenty six protons are formed by supernova nucleosynthesis in supernovae, which, when they explode, blast these elements far into space as planetary nebulae, where they may become incorporated into planets when they are formed.When different elements are chemically combined, with the atoms held together by chemical bonds, they form chemical compounds. Only a minority of elements are found uncombined as relatively pure minerals. Among the more common of such ""native elements"" are copper, silver, gold, carbon (as coal, graphite, or diamonds), and sulfur. All but a few of the most inert elements, such as noble gases and noble metals, are usually found on Earth in chemically combined form, as chemical compounds. While about 32 of the chemical elements occur on Earth in native uncombined forms, most of these occur as mixtures. For example, atmospheric air is primarily a mixture of nitrogen, oxygen, and argon, and native solid elements occur in alloys, such as that of iron and nickel.The history of the discovery and use of the elements began with primitive human societies that found native elements like carbon, sulfur, copper and gold. Later civilizations extracted elemental copper, tin, lead and iron from their ores by smelting, using charcoal. Alchemists and chemists subsequently identified many more, with almost all of the naturally-occurring elements becoming known by 1900. The properties of the chemical elements are summarized on the periodic table, which organizes the elements by increasing atomic number into rows (""periods"") in which the columns (""groups"") share recurring (""periodic"") physical and chemical properties. Save for unstable radioactive elements with short half-lives, all of the elements are available industrially, most of them in high degrees of purity.