File - Biochemistry
... Calculate the atomic mass of magnesium. The three magnesium isotopes have atomic masses and relative abundances as follows: 23.985 amu (78.99%) 24.986 amu (10.00%) 25.982 amu (11.01%) ...
... Calculate the atomic mass of magnesium. The three magnesium isotopes have atomic masses and relative abundances as follows: 23.985 amu (78.99%) 24.986 amu (10.00%) 25.982 amu (11.01%) ...
ATOMIC THEORY
... different masses. Atoms of an element that are chemically alike but differ in mass are called ______________________ of the element. Because of the discovery of isotopes, scientists hypothesized that atoms contained still a third type of particle that explained these differences in mass. Calculation ...
... different masses. Atoms of an element that are chemically alike but differ in mass are called ______________________ of the element. Because of the discovery of isotopes, scientists hypothesized that atoms contained still a third type of particle that explained these differences in mass. Calculation ...
Chemistry 2011-2012
... SC3a. Discriminate between the relative size, charge, and position of protons, neutrons, and electrons in the atom. SC3b. Use the orbital configuration of neutral atoms to explain its effect on the atom’s chemical properties. SC3c. Explain the relationship of the proton number to the element’s ident ...
... SC3a. Discriminate between the relative size, charge, and position of protons, neutrons, and electrons in the atom. SC3b. Use the orbital configuration of neutral atoms to explain its effect on the atom’s chemical properties. SC3c. Explain the relationship of the proton number to the element’s ident ...
Midterm Review 4
... 56. An element which is considered to be a metalloid is: a. Boron b. Calcium c. Oxygen d. Sodium 57. The element Iodine is a a. period 5 alkali metal b. period 4 halogen c. period 5 halogen d. period 5 transition metal 58. Sodium and Potassium have similar properties because they have the same ___. ...
... 56. An element which is considered to be a metalloid is: a. Boron b. Calcium c. Oxygen d. Sodium 57. The element Iodine is a a. period 5 alkali metal b. period 4 halogen c. period 5 halogen d. period 5 transition metal 58. Sodium and Potassium have similar properties because they have the same ___. ...
Chemistry Definitions
... 2. Atomic number (Z): The number of protons in the nucleus of each atom of an element 3. Mass number (A): Total number of neutrons and protons present in the nucleus if an atom of an element 4. Isotopes: Elements of the same atomic number but different number of neutrons. They have the same electron ...
... 2. Atomic number (Z): The number of protons in the nucleus of each atom of an element 3. Mass number (A): Total number of neutrons and protons present in the nucleus if an atom of an element 4. Isotopes: Elements of the same atomic number but different number of neutrons. They have the same electron ...
Atomic Structure - Physical Science
... In Greek, the prefix "a" means "not" and the word "tomos" means cut. Our word atom therefore comes from atomos, a Greek word ...
... In Greek, the prefix "a" means "not" and the word "tomos" means cut. Our word atom therefore comes from atomos, a Greek word ...
Chapter 2 Atoms, Molecules, and Ions
... The Law of Definite Proportions: Two or more elements form more than one compound, the masses of one element in these compounds for a fixed mass of the other element are in ratios of small whole numbers. 1.000g carbon react with oxygen 2 compounds 1.3321g oxygen/1.000g carbon 2.6642g oxygen/1.000g ...
... The Law of Definite Proportions: Two or more elements form more than one compound, the masses of one element in these compounds for a fixed mass of the other element are in ratios of small whole numbers. 1.000g carbon react with oxygen 2 compounds 1.3321g oxygen/1.000g carbon 2.6642g oxygen/1.000g ...
25 NUCLEAR CHEMISTRY NOTES __ /__ pts
... 5) Artificial Transmutation is when a relatively stable nucleus is impacted by a particle bullet at high speeds and becomes an unstable nucleus of a different element. Nuclear fission occurs when nuclei of U-235 or Pu239 are impacted by a neutron and split into two smaller nuclei and more neutrons. ...
... 5) Artificial Transmutation is when a relatively stable nucleus is impacted by a particle bullet at high speeds and becomes an unstable nucleus of a different element. Nuclear fission occurs when nuclei of U-235 or Pu239 are impacted by a neutron and split into two smaller nuclei and more neutrons. ...
Atoms, Molecules and Ions History
... Becquerel, found that a piece of a mineral containing uranium could produce its image on a photographic plate in the absence of light. He attributed this phenomenon to a spontaneous emission of something which he called "radiation" which originated from the uranium. ...
... Becquerel, found that a piece of a mineral containing uranium could produce its image on a photographic plate in the absence of light. He attributed this phenomenon to a spontaneous emission of something which he called "radiation" which originated from the uranium. ...
hydrogen atom
... - by similar chemical properties in each vertical family (group) - by roughly increasing atomic weight within each horizontal row • Used to predict existence of new elements (of 10, found 7; other 3 do not exist) ...
... - by similar chemical properties in each vertical family (group) - by roughly increasing atomic weight within each horizontal row • Used to predict existence of new elements (of 10, found 7; other 3 do not exist) ...
CHEM 101 1st Major (Term 161)
... 1. A weather balloon filled with helium has a diameter of 3.50 ft. What is the mass in grams of the helium in the balloon? The density of the helium is 0.166 g/L. The volume can be calculated as (4/3)r3. [1 ft =12 in; 1 in = 2.54 cm] A) 106 g B) 271 g C) 21.3 g D) 79.9 g E) 63.6 g ...
... 1. A weather balloon filled with helium has a diameter of 3.50 ft. What is the mass in grams of the helium in the balloon? The density of the helium is 0.166 g/L. The volume can be calculated as (4/3)r3. [1 ft =12 in; 1 in = 2.54 cm] A) 106 g B) 271 g C) 21.3 g D) 79.9 g E) 63.6 g ...
Chapter 5 Atomic Structure and the Periodic Table
... amu (atomic mass unit = 1.66 x 10-24 grams) The electron was discovered by the English physicist Sir Joseph J. Thomson around 1897 with the use of a cathode ray tube. A cathode ray tube is similar to your TV. It has an anode (negative electrode) and a cathode (positive electrode). These are enclosed ...
... amu (atomic mass unit = 1.66 x 10-24 grams) The electron was discovered by the English physicist Sir Joseph J. Thomson around 1897 with the use of a cathode ray tube. A cathode ray tube is similar to your TV. It has an anode (negative electrode) and a cathode (positive electrode). These are enclosed ...
synthesis reaction
... during a chemical reaction is called an oxidation. Oxygen is not necessary for an element to go through oxidation. This is a broad term for losing electrons. Sodium (Na) atoms go through oxidation to become ions: Na Na+ + 1e-. Everything in groups 1-13 can go through oxidation. In a chemical ...
... during a chemical reaction is called an oxidation. Oxygen is not necessary for an element to go through oxidation. This is a broad term for losing electrons. Sodium (Na) atoms go through oxidation to become ions: Na Na+ + 1e-. Everything in groups 1-13 can go through oxidation. In a chemical ...
1. Select the correct statement about subatomic particles. a
... e. No reaction takes place because silver is less reactive than potassium. 74. A double-replacement reaction takes place when aqueous cobalt(III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction would be ___. a. Co(OH)3 d. LiCl3 b. Co(OH)2 e. Cl3OH c. LiCo3 75. A ...
... e. No reaction takes place because silver is less reactive than potassium. 74. A double-replacement reaction takes place when aqueous cobalt(III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction would be ___. a. Co(OH)3 d. LiCl3 b. Co(OH)2 e. Cl3OH c. LiCo3 75. A ...
Chapter 4 “Atomic Structure” Section 4.1 Defining the Atom
... one element are different from atoms of a different element. 3. Atoms of different elements can physically mix together or can be chemically combine to form compounds. 4. Chemical reactions occur when atoms are separated, joined, or rearranged. However, atoms of an element never changes into atoms o ...
... one element are different from atoms of a different element. 3. Atoms of different elements can physically mix together or can be chemically combine to form compounds. 4. Chemical reactions occur when atoms are separated, joined, or rearranged. However, atoms of an element never changes into atoms o ...
Test - Regents
... 88 Based on Reference Table L, the Ka of H2S is 9.5 ¥ 10–8. This value indicates that H2S is a ...
... 88 Based on Reference Table L, the Ka of H2S is 9.5 ¥ 10–8. This value indicates that H2S is a ...
Lecture 2 - Unit 1 Part 2 Slides
... Protons and neutrons (nucleons) are located in the center of an atom; a region called the nucleus. Electrons are found very far from the nucleus, surrounding the nucleus in what we call the electron cloud. III. ...
... Protons and neutrons (nucleons) are located in the center of an atom; a region called the nucleus. Electrons are found very far from the nucleus, surrounding the nucleus in what we call the electron cloud. III. ...
Chapter 2 Atoms and Elements
... Isotopes of Magnesium In naturally occurring magnesium, Isotopes of Mg . there are three isotopes ...
... Isotopes of Magnesium In naturally occurring magnesium, Isotopes of Mg . there are three isotopes ...
Lab 5
... On the next page is a table of stellar spectra; each “row” represents the emissions from a particular star. The star’s abbreviated name is given to the left of its spectrum; for instance, the first star is “10 Lacerta”, which is the tenth brightest star in the constellation Lacerta. The star’s spec ...
... On the next page is a table of stellar spectra; each “row” represents the emissions from a particular star. The star’s abbreviated name is given to the left of its spectrum; for instance, the first star is “10 Lacerta”, which is the tenth brightest star in the constellation Lacerta. The star’s spec ...
History of the Atom
... with cathode rays (originates for the cathode). - Cathode rays move toward the anode, pass through hole to form beam - Beams bends away from the negatively charged plate and toward the positively charged plate. Concluded that a cathode ray consists of a beam of negatively charged particles (electron ...
... with cathode rays (originates for the cathode). - Cathode rays move toward the anode, pass through hole to form beam - Beams bends away from the negatively charged plate and toward the positively charged plate. Concluded that a cathode ray consists of a beam of negatively charged particles (electron ...
chapter 3 notes
... • The principal QN is is identified by the letter n and gives the main energy level of the electron. • The principal QN can have the values 1,2,3,4,5…… • The second QN is identified by the letter l and gives the shape of the electron orbital. • The l QN can have the values 0,1,2,3…n-1 • The m l QN g ...
... • The principal QN is is identified by the letter n and gives the main energy level of the electron. • The principal QN can have the values 1,2,3,4,5…… • The second QN is identified by the letter l and gives the shape of the electron orbital. • The l QN can have the values 0,1,2,3…n-1 • The m l QN g ...
Atoms, Elements, Compounds, and Mixtures
... be divided and still maintain its years, scientists have characteristics. designed many different models for this structure. Atoms are the building blocks of the universe. There are 92 Each one was the best different kinds of atoms that model at the time, but as occur naturally, although more ne ...
... be divided and still maintain its years, scientists have characteristics. designed many different models for this structure. Atoms are the building blocks of the universe. There are 92 Each one was the best different kinds of atoms that model at the time, but as occur naturally, although more ne ...