Honors Chemistry
... If the charges add up to zero, then just put the symbols together to form the formula. If the charges do not add up to zero, switch the charges and reduce. Example: Make a compound from acetate and calcium. Calcium goes first because calcium is positive. ...
... If the charges add up to zero, then just put the symbols together to form the formula. If the charges do not add up to zero, switch the charges and reduce. Example: Make a compound from acetate and calcium. Calcium goes first because calcium is positive. ...
Unit 4 Test REVIEW
... 35. Potassium has a relative atomic mass that is not a whole number because some of its atoms have more _________________ than others. 36. A reaction in which two light nuclei combine to form a heavier nucleus is termed ___________. 37. The most penetrating and highest energy form of radiation is __ ...
... 35. Potassium has a relative atomic mass that is not a whole number because some of its atoms have more _________________ than others. 36. A reaction in which two light nuclei combine to form a heavier nucleus is termed ___________. 37. The most penetrating and highest energy form of radiation is __ ...
The History of Atoms Power Point
... Ancient Models 2000 years ago Greek Scientist named Democritus stated that all matter was made of the smallest particle Named the particle “atom” after the Greek word “atomos” meaning indivisible Stated that different elements were various shapes ...
... Ancient Models 2000 years ago Greek Scientist named Democritus stated that all matter was made of the smallest particle Named the particle “atom” after the Greek word “atomos” meaning indivisible Stated that different elements were various shapes ...
Exam Review - hrsbstaff.ednet.ns.ca
... 36. Which is the most reactive of all the elements? a) fluorine b) sodium c) oxygen d) hydrogen 37. In Mendeleev's periodic table, the horizontal rows are called a) groups. b) periods. c) families. d) columns. 38. Which group of the periodic table contains the least reactive elements? a) alkali met ...
... 36. Which is the most reactive of all the elements? a) fluorine b) sodium c) oxygen d) hydrogen 37. In Mendeleev's periodic table, the horizontal rows are called a) groups. b) periods. c) families. d) columns. 38. Which group of the periodic table contains the least reactive elements? a) alkali met ...
Chapter 4 Structure of the Atom
... 2. Atoms of a given element are identical in the physical and chemical properties 3. Atoms of different elements have different physical and chemical properties 4. Atoms of different elements combine in simple, whole-number ratios to form chemical compounds. 5. Atoms cannot be subdivided, created, o ...
... 2. Atoms of a given element are identical in the physical and chemical properties 3. Atoms of different elements have different physical and chemical properties 4. Atoms of different elements combine in simple, whole-number ratios to form chemical compounds. 5. Atoms cannot be subdivided, created, o ...
Matter and Atoms
... States of Matter – 3.3 Objectives •Describe the states of matter on Earth • Explain the reasons that matter exists in these ...
... States of Matter – 3.3 Objectives •Describe the states of matter on Earth • Explain the reasons that matter exists in these ...
TEST REVIEW KEY: STANDARDS 7-10 Practice Problems: 1. How
... 20. An atom of neon has a mass number of 21. How many neutrons does it have? 11 ...
... 20. An atom of neon has a mass number of 21. How many neutrons does it have? 11 ...
Test #1 Study Guide
... contained in one small core called the nucleus. o Most of the volume of the atom is empty space, throughout which tiny, negatively charged electrons are dispersed. o There are as many negatively charged electrons outside the nucleus as there are positively charged particles (protons) within the nucl ...
... contained in one small core called the nucleus. o Most of the volume of the atom is empty space, throughout which tiny, negatively charged electrons are dispersed. o There are as many negatively charged electrons outside the nucleus as there are positively charged particles (protons) within the nucl ...
Unit 1 - Measurement Atomic Theory
... (a) Number of nucleons in the nucleus (proton and neutrons) (b) No. of neutrons = Mass No. – Atomic No. (c) Isotopes (i) Atoms which have the same atomic number and different mass numbers (ii) Nuclear Symbol: 5) Nuclear Stability (a) The greater the number of protons in a nucleus, the higher the rat ...
... (a) Number of nucleons in the nucleus (proton and neutrons) (b) No. of neutrons = Mass No. – Atomic No. (c) Isotopes (i) Atoms which have the same atomic number and different mass numbers (ii) Nuclear Symbol: 5) Nuclear Stability (a) The greater the number of protons in a nucleus, the higher the rat ...
The Size of the Atom Atomic Numbers Atomic Mass Numbers
... diagram on page 201, picturing the basic structure of the atom, is not drawn to scale. If the nucleus were as large as shown, the electron cloud would extend far beyond your classroom. The negative electrons stick around the nucleus because they are attracted to the positively charged protons. Elect ...
... diagram on page 201, picturing the basic structure of the atom, is not drawn to scale. If the nucleus were as large as shown, the electron cloud would extend far beyond your classroom. The negative electrons stick around the nucleus because they are attracted to the positively charged protons. Elect ...
Pre-AP Chemistry
... Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. (1a) Students know the nucleus of the atom is much smaller than the atom yet contains most of its mass. (1e) Students know some naturally occurring isotopes of elements are radioa ...
... Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. (1a) Students know the nucleus of the atom is much smaller than the atom yet contains most of its mass. (1e) Students know some naturally occurring isotopes of elements are radioa ...
gained (-) or lost (+) an electron
... When an atom gains an electron and becomes more (-) because there are more negative electrons present than positive protons. (Think: “An” means NOT or Negative for Ions) ...
... When an atom gains an electron and becomes more (-) because there are more negative electrons present than positive protons. (Think: “An” means NOT or Negative for Ions) ...
Unit 4
... What are the parts of an atom and their functions? How do you determine the mass of an atom of an element? How do protons determine an element's identity? How do valence electrons determine an element’s chemical properties and reactivity? Does an atom have an electrical charge? ...
... What are the parts of an atom and their functions? How do you determine the mass of an atom of an element? How do protons determine an element's identity? How do valence electrons determine an element’s chemical properties and reactivity? Does an atom have an electrical charge? ...
chemistry i - surrattchemistry
... nucleuselectrons exist in orbitals outside the nucleus b. The atom is a hard sphereelectrons exist in orbitals outside the nucleusmost of the atom is empty space with a small dense nucleus. c. Most of the atom is empty space with a small, dense nucleuselectrons exist in orbitals outside the nucl ...
... nucleuselectrons exist in orbitals outside the nucleus b. The atom is a hard sphereelectrons exist in orbitals outside the nucleusmost of the atom is empty space with a small dense nucleus. c. Most of the atom is empty space with a small, dense nucleuselectrons exist in orbitals outside the nucl ...
600 $600
... As one moves down the elements in the first column of the periodic table, the A. Atomic number of the elements increases. ...
... As one moves down the elements in the first column of the periodic table, the A. Atomic number of the elements increases. ...
final exam practice test - Clayton State University
... a. Molecular geometry affects the dipole moment of a molecule. b. The presence of lone (unshared) pairs of electrons affect the dipole moment of a molecule. c. Generally, as electronegativity differences increases in diatomic molecules, the dipole moments increase. d. The dipole moment equals the pr ...
... a. Molecular geometry affects the dipole moment of a molecule. b. The presence of lone (unshared) pairs of electrons affect the dipole moment of a molecule. c. Generally, as electronegativity differences increases in diatomic molecules, the dipole moments increase. d. The dipole moment equals the pr ...
Unit 1: Atoms, Molecules, and Ions
... Since the # of electrons no longer equals the # of protons, these atoms must be charged. A charged atom is called an ion. Cations are positively charged ions – they have lost electrons (and now have more protons than electrons) Anions are negatively charged ions – they have gained electrons (and now ...
... Since the # of electrons no longer equals the # of protons, these atoms must be charged. A charged atom is called an ion. Cations are positively charged ions – they have lost electrons (and now have more protons than electrons) Anions are negatively charged ions – they have gained electrons (and now ...
NM Strand
... 50. A student spills a chemical in the laboratory. What should he do first? 51. A sour candy has a pH of: 52. A characteristic that can be observed or measured without changing the sample’s composition is 53. An experiment that determines the maximum number of grams of a substance that will dissolve ...
... 50. A student spills a chemical in the laboratory. What should he do first? 51. A sour candy has a pH of: 52. A characteristic that can be observed or measured without changing the sample’s composition is 53. An experiment that determines the maximum number of grams of a substance that will dissolve ...
Interesting and Helpful Websites Early Models of the Atom
... Atoms of the same element are identical. Atoms of different elements mix. Atoms of different elements chemically combine in simple whole number ratios. Chemical reactions occur when atoms are separated from or joined to other atoms. – Atoms contain particles that have electric charge. – Disc ...
... Atoms of the same element are identical. Atoms of different elements mix. Atoms of different elements chemically combine in simple whole number ratios. Chemical reactions occur when atoms are separated from or joined to other atoms. – Atoms contain particles that have electric charge. – Disc ...
Energy Atoms and Elements Practice Problems
... B) An electron has a negative charge and a mass of approximately 1 amu. C) A proton has a positive charge and a mass of approximately 2 amu. D) A proton has a positive charge and a mass of approximately 1 amu. ...
... B) An electron has a negative charge and a mass of approximately 1 amu. C) A proton has a positive charge and a mass of approximately 2 amu. D) A proton has a positive charge and a mass of approximately 1 amu. ...
Lecture Notes Part 2 - Dr. Samples` Chemistry Classes
... • The number underneath an Elemental Symbol on the Periodic Table is its atomic mass (the mass of 1 “average” atom in amu). • Is a formula mass very useful in the lab? Well, can we weigh out individual atoms or ions on a lab balance? They are too tiny to weigh or pick out individually! • Chemists we ...
... • The number underneath an Elemental Symbol on the Periodic Table is its atomic mass (the mass of 1 “average” atom in amu). • Is a formula mass very useful in the lab? Well, can we weigh out individual atoms or ions on a lab balance? They are too tiny to weigh or pick out individually! • Chemists we ...