Living Chemistry Atoms, Molecules and Compounds
... a. Every substance is made up of small, indivisible particles called atoms b. Molecules are made of atoms that are chemically bonded to one another B. Elements and Compounds 1. Elements a. Substances made of only one kind of atom b. Periodic Table represents the known elements and their symbols (Som ...
... a. Every substance is made up of small, indivisible particles called atoms b. Molecules are made of atoms that are chemically bonded to one another B. Elements and Compounds 1. Elements a. Substances made of only one kind of atom b. Periodic Table represents the known elements and their symbols (Som ...
Physical Science 1 Chapter 18 – Properties of Atoms & the
... Atomic Models Models- used to help you understand something too large or too small to see Democritus – indivisible atom 450 BC Dalton- atoms are just spheres John Thomson – Plum Pudding model 1904 Discovered the electron 1897 – cathode ray tubePlum Pudding model- atoms had small negatively charged ...
... Atomic Models Models- used to help you understand something too large or too small to see Democritus – indivisible atom 450 BC Dalton- atoms are just spheres John Thomson – Plum Pudding model 1904 Discovered the electron 1897 – cathode ray tubePlum Pudding model- atoms had small negatively charged ...
mystery elements
... What are the forces called in the nucleus that hold the protons and neutrons together, even though like charges should repel? ______________________________ Define atomic number. Define isotope (p. 76) Isotopes have a different number of which subatomic particle? __________________ Because isotopes ...
... What are the forces called in the nucleus that hold the protons and neutrons together, even though like charges should repel? ______________________________ Define atomic number. Define isotope (p. 76) Isotopes have a different number of which subatomic particle? __________________ Because isotopes ...
Name________________________ Midterm Review Date
... nucleus has a positive charge. D) An atom has hardly any empty space, and the nucleus has a positive charge. 18. Which element is an alkali metal? A) sodium C) hydrogen ...
... nucleus has a positive charge. D) An atom has hardly any empty space, and the nucleus has a positive charge. 18. Which element is an alkali metal? A) sodium C) hydrogen ...
Exam 2 Review - Iowa State University
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
Document
... rock into powder would reduce it to tiny bits of matter that couldn’t be broken down any more Wasn’t popular at time because there was no experimental evidence to support his claim ...
... rock into powder would reduce it to tiny bits of matter that couldn’t be broken down any more Wasn’t popular at time because there was no experimental evidence to support his claim ...
File
... Characteristics that describe how two substances___________________ to produce new substances Rusting, burning, reaction with acid or base ...
... Characteristics that describe how two substances___________________ to produce new substances Rusting, burning, reaction with acid or base ...
Name Period Nuclear Study Packet Set 1 1. What subatomic
... 2. All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99 decays to 50.0 g of technetium-99 in 639 000 y, what is its half-life? 3. A 208 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60.0 h. What is the half-life o ...
... 2. All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99 decays to 50.0 g of technetium-99 in 639 000 y, what is its half-life? 3. A 208 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60.0 h. What is the half-life o ...
worksheet #1 - chemistryrocks.net
... tables are “weighted averages” of the weights of the different naturally occurring isotopes of the element. Let’s look at an example. Approximately 75% of the chlorine atoms found in nature have a mass of 35. The other 25% have a mass of 37. What should we report as the atomic weight for chlorine? W ...
... tables are “weighted averages” of the weights of the different naturally occurring isotopes of the element. Let’s look at an example. Approximately 75% of the chlorine atoms found in nature have a mass of 35. The other 25% have a mass of 37. What should we report as the atomic weight for chlorine? W ...
S2 Chemistry - Aberdeen Grammar School
... Using heat to break down compounds Some metals can be obtained from metal oxides by heating strongly or heating with the element carbon. For example: If copper oxide is heated strongly with carbon powder it can be broken down into the elements copper and oxygen. ...
... Using heat to break down compounds Some metals can be obtained from metal oxides by heating strongly or heating with the element carbon. For example: If copper oxide is heated strongly with carbon powder it can be broken down into the elements copper and oxygen. ...
Chapter 4 - Germainium.net
... • Atoms of a given element are identical in size, mass, and chemical properties, and are different from those of another element. • Different atoms combine in simple whole number ratios to form compounds. • In a chemical reaction, atoms are separated, combined or rearranged. ...
... • Atoms of a given element are identical in size, mass, and chemical properties, and are different from those of another element. • Different atoms combine in simple whole number ratios to form compounds. • In a chemical reaction, atoms are separated, combined or rearranged. ...
Chapter 4 Atomic Structure
... 3) Atoms of different elements combine in simple whole-number ratios to form chemical compounds 4) In chemical reactions, atoms are combined, separated, or rearranged – but never changed into atoms of another element. ...
... 3) Atoms of different elements combine in simple whole-number ratios to form chemical compounds 4) In chemical reactions, atoms are combined, separated, or rearranged – but never changed into atoms of another element. ...
atom
... • All elements are composed of atoms • All atoms of the same element have the same mass, and atoms of different elements have different masses • Compounds contain atoms of more than one ...
... • All elements are composed of atoms • All atoms of the same element have the same mass, and atoms of different elements have different masses • Compounds contain atoms of more than one ...
04 Mass Spectrometer and Isotopes
... been different if your buggy was not quite so full? How easily you can change the direction of your movement is affected by how much mass you have. Isotopes have different masses! Maybe we can use this to determine the mass of different isotopes! ...
... been different if your buggy was not quite so full? How easily you can change the direction of your movement is affected by how much mass you have. Isotopes have different masses! Maybe we can use this to determine the mass of different isotopes! ...
5 periodicity and atomic structure
... up) principle guides the filling order of orbitals. The resultant lowest energy is called the ground- state electron configuration. Several orbitals will have the same energylevel which are said to be degenerate. ...
... up) principle guides the filling order of orbitals. The resultant lowest energy is called the ground- state electron configuration. Several orbitals will have the same energylevel which are said to be degenerate. ...
Unit 2 -- Atomic Structure, Periodic Table, and
... diagrams that show the valence electrons as dots. Since only the valence electrons are involved in bonding, this is very useful in predicting which atoms will combine chemically. ...
... diagrams that show the valence electrons as dots. Since only the valence electrons are involved in bonding, this is very useful in predicting which atoms will combine chemically. ...
Name: ___________ Class: _____ Date: _______________ FALL
... c. sugar is dissolved in a solution. d. an unexpected color change occurs. ____ 11. Which sign does NOT indicate that a chemical change has occurred? a. color change. c. energy absorbed or released. b. dissolving in a solution. d. gas produced. ____ 12. A physical change occurs when a. milk sours. c ...
... c. sugar is dissolved in a solution. d. an unexpected color change occurs. ____ 11. Which sign does NOT indicate that a chemical change has occurred? a. color change. c. energy absorbed or released. b. dissolving in a solution. d. gas produced. ____ 12. A physical change occurs when a. milk sours. c ...
1 Notes Ch. 4 and 25: Atomic Structure and Nuclear Chemistry
... • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford was the first to induce (_____________________) transmutation. • He proved that nuclear reactions can be produced __________________________. • Induced transmutation ...
... • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford was the first to induce (_____________________) transmutation. • He proved that nuclear reactions can be produced __________________________. • Induced transmutation ...
100
... chemically combined A compound is different from an element because it is 2 different elements combined. An element is the same all the way through. ...
... chemically combined A compound is different from an element because it is 2 different elements combined. An element is the same all the way through. ...
Chapter 5 Atomic Structure & the Periodic Table
... • Magnesium = region in Greece known as Magnesia • Lithium = Greek word lithos, meaning stone • Neptunium = after the planet Neptune • Hydrogen (H), Sulfur (S), Carbon (C) • Gold (Au), Lead (Pb), Iron (Fe), Copper (Cu) = symbols come from latin names. ...
... • Magnesium = region in Greece known as Magnesia • Lithium = Greek word lithos, meaning stone • Neptunium = after the planet Neptune • Hydrogen (H), Sulfur (S), Carbon (C) • Gold (Au), Lead (Pb), Iron (Fe), Copper (Cu) = symbols come from latin names. ...