CHAPTER 4 EXAM: THE NATURE OF THE ATOM (modified)
... ____ 26. Which form of radiation is the most penetrating? a. alpha c. X-ray b. gamma Short Answer 27. What is the average atomic mass of this element? SHOW ALL WORK!!! Isotope Mass (amu) Percent Abundance Phosphorus-29 ...
... ____ 26. Which form of radiation is the most penetrating? a. alpha c. X-ray b. gamma Short Answer 27. What is the average atomic mass of this element? SHOW ALL WORK!!! Isotope Mass (amu) Percent Abundance Phosphorus-29 ...
Chemistry
... The Ingredients of Matter • Element: a substance consisting entirely of atoms of the same atomic number • Everything on earth is made of chemical elements • 114 chemical elements have been identified • 92 are natural elements found on Earth • The rest are made in a lab ...
... The Ingredients of Matter • Element: a substance consisting entirely of atoms of the same atomic number • Everything on earth is made of chemical elements • 114 chemical elements have been identified • 92 are natural elements found on Earth • The rest are made in a lab ...
periodic table
... periodic table before your reading. What is something you thought was cool/unique about it? What is periodic? What is periodic about the table? ...
... periodic table before your reading. What is something you thought was cool/unique about it? What is periodic? What is periodic about the table? ...
Zn 8 p + 8 p + 30 p + 8 n 8 n 35 n 8 e
... but different numbers of neutrons. Atoms of the same element (same atomic number) with different mass numbers Isotopes of chlorine 35Cl ...
... but different numbers of neutrons. Atoms of the same element (same atomic number) with different mass numbers Isotopes of chlorine 35Cl ...
File
... • e’ has about 2000 times less mass than a proton. • e’ has a relative charge of - 1. • Atoms can lose and gain one or more electrons to form ions. • Two types of ions: • Cation forms when atom loses e’s. Na ---------> Na +1 + e’ • Anion forms when atom gains e’s. Cl + e’ ----------> Cl -1 ...
... • e’ has about 2000 times less mass than a proton. • e’ has a relative charge of - 1. • Atoms can lose and gain one or more electrons to form ions. • Two types of ions: • Cation forms when atom loses e’s. Na ---------> Na +1 + e’ • Anion forms when atom gains e’s. Cl + e’ ----------> Cl -1 ...
The History of the Periodic Table
... masses. Dalton published the first table of elements that included atomic masses.As more and more work was done in this area, it became obvious that there were experimental errors in many of the atomic masses that Dalton and other workers had reported. For the rest of the 19th century, atomic masses ...
... masses. Dalton published the first table of elements that included atomic masses.As more and more work was done in this area, it became obvious that there were experimental errors in many of the atomic masses that Dalton and other workers had reported. For the rest of the 19th century, atomic masses ...
Year 11 Chemistry Balancing Equations
... c When dilute sodium sulfate Na2SO4 solution is added to dilute barium nitrate Ba(NO3)2 solution, barium sulfate BaSO4 precipitates, leaving sodium nitrate NaNO3 in solution. d Dilute sodium hydroxide is added to dilute sulfuric acid H2SO4, producing water and the soluble salt sodium sulfate Na2SO4 ...
... c When dilute sodium sulfate Na2SO4 solution is added to dilute barium nitrate Ba(NO3)2 solution, barium sulfate BaSO4 precipitates, leaving sodium nitrate NaNO3 in solution. d Dilute sodium hydroxide is added to dilute sulfuric acid H2SO4, producing water and the soluble salt sodium sulfate Na2SO4 ...
Chap 03A-Atoms and Elements.pptx
... Ø explains the difference between an element and a compound. Ø explains two scientific laws, and Ø predicts a new scientific law. ...
... Ø explains the difference between an element and a compound. Ø explains two scientific laws, and Ø predicts a new scientific law. ...
Document
... 74. A column of elements in the periodic table is known as a ___________________. 75. What type of ions have names ending in –ide? ...
... 74. A column of elements in the periodic table is known as a ___________________. 75. What type of ions have names ending in –ide? ...
Document
... Dalton’s Atomic Theory - Summary 1. matter is composed, indivisible particles (atoms) 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new comp ...
... Dalton’s Atomic Theory - Summary 1. matter is composed, indivisible particles (atoms) 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new comp ...
MORE ABOUT PROTONS, NEUTRONS AND ELECTRONS
... not the same as the average. If we look at the two naturally occuring isotopes of chlorine, they are 35Cl and 37Cl, having masses of 35 a.m.u. and 37 a.m.u. respectively. The average of 35 and 37 is 36, but the relative atomic mass (Ar) of chlorine is in fact 35.5. Not only the mass of the isopes bu ...
... not the same as the average. If we look at the two naturally occuring isotopes of chlorine, they are 35Cl and 37Cl, having masses of 35 a.m.u. and 37 a.m.u. respectively. The average of 35 and 37 is 36, but the relative atomic mass (Ar) of chlorine is in fact 35.5. Not only the mass of the isopes bu ...
Chapter 2
... • Fractional abundance: fraction of a total number of atoms, which consists of a particular isotope • Isotopic mass is not exactly equal to mass number – Neon-20, mass = 19.992 amu, abund = 0.9051 – Neon-21, mass = 20.994 amu, abund = 0.0027 – Neon-22, mass = 21.991 amu, abund = 0.0922 • Multiply is ...
... • Fractional abundance: fraction of a total number of atoms, which consists of a particular isotope • Isotopic mass is not exactly equal to mass number – Neon-20, mass = 19.992 amu, abund = 0.9051 – Neon-21, mass = 20.994 amu, abund = 0.0027 – Neon-22, mass = 21.991 amu, abund = 0.0922 • Multiply is ...
Final Exam Review Day 1 - teacherstroh
... How do you know how many there are in each atom? Protons= ...
... How do you know how many there are in each atom? Protons= ...
CHAPTER 2: ATOMS, IONS, AND COMPOUNDS
... water, fire, and earth. Aristotle (384-321 B.C.): accepted Empedocles idea and added a fifth element, heavenly ether, which is perfect, eternal, and incorruptible. Aristotle’s idea of five basic elements was accepted for 2000 years. John Dalton (1766-1844), an English chemist and physicist, establis ...
... water, fire, and earth. Aristotle (384-321 B.C.): accepted Empedocles idea and added a fifth element, heavenly ether, which is perfect, eternal, and incorruptible. Aristotle’s idea of five basic elements was accepted for 2000 years. John Dalton (1766-1844), an English chemist and physicist, establis ...
Chapter 2 Atoms, Molecules and Ions
... 19th Century) – When two elements form a series of compounds, the ratio of the masses of the second element that combine with 1g of the first element can always be reduced to small whole numbers. The ratio of the masses of oxygen in H2O and H2O2 will be a small whole number (“2”). ...
... 19th Century) – When two elements form a series of compounds, the ratio of the masses of the second element that combine with 1g of the first element can always be reduced to small whole numbers. The ratio of the masses of oxygen in H2O and H2O2 will be a small whole number (“2”). ...
AP Unit 0: Chemical Foundations
... ◦ in both weight and chemical properties. ◦ Each element is unique ...
... ◦ in both weight and chemical properties. ◦ Each element is unique ...
ISOTOPES
... all atoms of each element were the same. According to the model of atomic structure we have been developing, this would mean that each atom of an element would have the same number of protons, electrons, and neutrons as every other atom of the element. Thus the atomic mass of every atom of an elemen ...
... all atoms of each element were the same. According to the model of atomic structure we have been developing, this would mean that each atom of an element would have the same number of protons, electrons, and neutrons as every other atom of the element. Thus the atomic mass of every atom of an elemen ...
Notes - Science 2015-2016
... • With a partner at your table, complete the ion worksheet. You will have approximately 10 minutes. • Only talk about the task at hand. I will take points off your grade if you are not! ▫ Once you have decided on an area to work, you may not get out of your seat unless you ask. ...
... • With a partner at your table, complete the ion worksheet. You will have approximately 10 minutes. • Only talk about the task at hand. I will take points off your grade if you are not! ▫ Once you have decided on an area to work, you may not get out of your seat unless you ask. ...
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model
... column predict share the properties similar chemical of the unknown properties. elements. ...
... column predict share the properties similar chemical of the unknown properties. elements. ...
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model
... column predict share the properties similar chemical of the unknown properties. elements. ...
... column predict share the properties similar chemical of the unknown properties. elements. ...
Atomic terms - ATOMIC NUMBER: The number of protons in the
... - atoms in a group often have similar chemical (and sometimes physical) properties Group numbering: 1) Roman numerals: Similar to Mendeleev's groupings - "A" groups: Main group or "representative" elements - "B" groups: Transistion elements (also called transition metals) 2) Arabic numerals: IUPAC ( ...
... - atoms in a group often have similar chemical (and sometimes physical) properties Group numbering: 1) Roman numerals: Similar to Mendeleev's groupings - "A" groups: Main group or "representative" elements - "B" groups: Transistion elements (also called transition metals) 2) Arabic numerals: IUPAC ( ...
Atomic Structure
... atoms of one element are different from the atoms of another element. • 3. Atoms of different elements can physically mix together or can chemically combine in simplewhole number ratios to form compounds. • 4. Chemical reactions occur when atoms are separated, joined or rearranged. ...
... atoms of one element are different from the atoms of another element. • 3. Atoms of different elements can physically mix together or can chemically combine in simplewhole number ratios to form compounds. • 4. Chemical reactions occur when atoms are separated, joined or rearranged. ...
Unit 4 Test REVIEW
... 29. ___________________ gold-foil experiment demonstrated that most of the atom is empty space. 30. Atomic mass is a relative scale based on which nuclide? 31. What is the mass number of an atom that has 20 protons, 22 neutrons and 20 electrons? 32. The word atom comes from the Greek word atomos mea ...
... 29. ___________________ gold-foil experiment demonstrated that most of the atom is empty space. 30. Atomic mass is a relative scale based on which nuclide? 31. What is the mass number of an atom that has 20 protons, 22 neutrons and 20 electrons? 32. The word atom comes from the Greek word atomos mea ...
SCI 3101 Test IV MULTIPLE CHOICE. 1) The sky is blue because air
... D) Today's instruments are able to measure the atomic masses to many decimal places. 16) Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit? ...
... D) Today's instruments are able to measure the atomic masses to many decimal places. 16) Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit? ...
ChemFinalgeocities
... When reacting with an atom of fluorine, an atom of lithium will lose an electron and become a lithium ...
... When reacting with an atom of fluorine, an atom of lithium will lose an electron and become a lithium ...