Unit A Review Questions
... and are being reduced by the zinc metal being oxidized. This would also account for the colour change in the copper nitrate solution. As the copper ions come out of the solution, the solution becomes a fainter colour. b. The voltage reading is zero because the electrons do not have to travel through ...
... and are being reduced by the zinc metal being oxidized. This would also account for the colour change in the copper nitrate solution. As the copper ions come out of the solution, the solution becomes a fainter colour. b. The voltage reading is zero because the electrons do not have to travel through ...
Chemistry Name_______________________ Chapter 4
... invention of television. Explain briefly Crookes’ observations and thus his discovery of the cathode ray. ...
... invention of television. Explain briefly Crookes’ observations and thus his discovery of the cathode ray. ...
Atomic - My CCSD
... Atoms of the same element are exactly alike . Every compound always has the same ratio and kinds of atoms . A chemical rxn is a rearrangement of atoms; they are not created or destroyed . ...
... Atoms of the same element are exactly alike . Every compound always has the same ratio and kinds of atoms . A chemical rxn is a rearrangement of atoms; they are not created or destroyed . ...
Atomic Theory I Package
... In the early 1800’s, scientists studying electricity produced tubes known as Geissler tubes. They consisted of a hollow glass tube with electrodes (metal) embedded at each end. When a source of electricity was attached to the electrodes, the gas inside the tube would glow. In 1855, a German physicis ...
... In the early 1800’s, scientists studying electricity produced tubes known as Geissler tubes. They consisted of a hollow glass tube with electrodes (metal) embedded at each end. When a source of electricity was attached to the electrodes, the gas inside the tube would glow. In 1855, a German physicis ...
The Chemical Basis of Life
... Isotopes are atoms of an element that all have the same number of protons, but have different numbers of neutrons. Radioisotopes – radioactive decay The time it takes for half of a radioactive substance to decay is called its half-life. ...
... Isotopes are atoms of an element that all have the same number of protons, but have different numbers of neutrons. Radioisotopes – radioactive decay The time it takes for half of a radioactive substance to decay is called its half-life. ...
Document
... of atoms of different elements in fixed ratios Are represented by formulas Molecular formula-symbols and subscripts are used to represent elements and their ratios in each molecule of a compound Structural formula-shows how the atoms are connected in a molecule using symbols to represent atoms and ...
... of atoms of different elements in fixed ratios Are represented by formulas Molecular formula-symbols and subscripts are used to represent elements and their ratios in each molecule of a compound Structural formula-shows how the atoms are connected in a molecule using symbols to represent atoms and ...
Atomic Structure
... D. He proposes the “Plum Pudding” model of atoms. 1. It states that negatively charged electrons are evenly placed inside a positively charged mass. 2. Thomson believed that the electrons were like plums embedded in a positively charged “pudding,” thus it was called the “plum pudding” model. ...
... D. He proposes the “Plum Pudding” model of atoms. 1. It states that negatively charged electrons are evenly placed inside a positively charged mass. 2. Thomson believed that the electrons were like plums embedded in a positively charged “pudding,” thus it was called the “plum pudding” model. ...
Review Questions
... A. All scientists must agree with an idea for it to be considered a theory. B. Theories can be proven correct. C. Scientists usually create an entirely new theory when evidence is found that ...
... A. All scientists must agree with an idea for it to be considered a theory. B. Theories can be proven correct. C. Scientists usually create an entirely new theory when evidence is found that ...
Chapter 3: States of Matter
... • An electron in an atom can move from one energy level to another when the atom gains or loses energy. • Electrons can move up multiple energy levels at a time if it gains the right amount of energy. The size of the jump between energy levels determines the amount of energy gained or lost. ...
... • An electron in an atom can move from one energy level to another when the atom gains or loses energy. • Electrons can move up multiple energy levels at a time if it gains the right amount of energy. The size of the jump between energy levels determines the amount of energy gained or lost. ...
Electron Proton Neutron
... The mass number of an element is the sum of the number of protons and neutrons present in the atom of that element. For example, the atom of boron has 5 protons and 6 neutrons. So, the mass number of boron is 5 + 6 = 11. ...
... The mass number of an element is the sum of the number of protons and neutrons present in the atom of that element. For example, the atom of boron has 5 protons and 6 neutrons. So, the mass number of boron is 5 + 6 = 11. ...
Chapter 4
... levels. For example, He was discovered on the sun in 1868 before it was discovered on Earth. The spectrum of light emitted by gases on the surface of the sun contained a yellow line that didn’t match a known element. ...
... levels. For example, He was discovered on the sun in 1868 before it was discovered on Earth. The spectrum of light emitted by gases on the surface of the sun contained a yellow line that didn’t match a known element. ...
Document
... Isotopes, Atomic Numbers, and Mass Numbers •Atomic number (Z) = number of protons in the nucleus. •Mass number (A) = total number of nucleons in the nucleus (i.e., protons and neutrons). ...
... Isotopes, Atomic Numbers, and Mass Numbers •Atomic number (Z) = number of protons in the nucleus. •Mass number (A) = total number of nucleons in the nucleus (i.e., protons and neutrons). ...
Ch 4 Powerpoint
... Determining subatomic particles in elements (GENERIC) Element symbol (X)one/two/three letter symbol for element Atomic number (Z) number of protons found in the element Mass number (A)number of protons + the number of neutrons The periodic table will give you all the information you need in order ...
... Determining subatomic particles in elements (GENERIC) Element symbol (X)one/two/three letter symbol for element Atomic number (Z) number of protons found in the element Mass number (A)number of protons + the number of neutrons The periodic table will give you all the information you need in order ...
CHAPTER 8 PERIODIC RELATIONSHIPS AMONG THE ELEMENTS
... Strategy: In comparing ionic radii, it is useful to classify the ions into three categories: (1) isoelectronic ions, (2) ions that carry the same charges and are generated from atoms of the same periodic group, and (3) ions that carry different charges but are generated from the same atom. In case ( ...
... Strategy: In comparing ionic radii, it is useful to classify the ions into three categories: (1) isoelectronic ions, (2) ions that carry the same charges and are generated from atoms of the same periodic group, and (3) ions that carry different charges but are generated from the same atom. In case ( ...
CHEMISTRY-1 CHAPTER 8 CHEMICAL REACTIONS
... Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
... Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
GCSE Radiation - Bishopston Comprehensive School Moodle
... When the Uranium atom splits into two it will form two lighter elements that are also radioactive. This becomes radioactive waste and is a big problem for nuclear power stations as it can remain dangerous for hundreds of years ...
... When the Uranium atom splits into two it will form two lighter elements that are also radioactive. This becomes radioactive waste and is a big problem for nuclear power stations as it can remain dangerous for hundreds of years ...
11 atomic number
... - The periodic table is arranged by proton number and atomic mass. **The heaviest elements (highest atomic mass) are farthest down and to the _____ on the periodic table - Lithium atom (notice how many protons (blue) and neutrons (red) it has) ...
... - The periodic table is arranged by proton number and atomic mass. **The heaviest elements (highest atomic mass) are farthest down and to the _____ on the periodic table - Lithium atom (notice how many protons (blue) and neutrons (red) it has) ...
Unit 1
... The Particle Theory of Matter • In 400 B.C. Democritus, a Greek philosopher, first proposed the idea of a basic particle of matter that could not be divided any further. • He called this particle the atom, based on the Greek word atomos meaning indivisible. • This early theory was not backed up by ...
... The Particle Theory of Matter • In 400 B.C. Democritus, a Greek philosopher, first proposed the idea of a basic particle of matter that could not be divided any further. • He called this particle the atom, based on the Greek word atomos meaning indivisible. • This early theory was not backed up by ...
Unit 2 Test Review - Liberty High School
... 10. Nitrogen oxide (NO) and nitrogen dioxide (NO2) are both made up of nitrogen and oxygen. Can you assume that they will both have similar physical and chemical properties? Why or why not? 11. An 18-L sample of element A (density 0.84 g/mL combines completely with a 4-L sample of element B (density ...
... 10. Nitrogen oxide (NO) and nitrogen dioxide (NO2) are both made up of nitrogen and oxygen. Can you assume that they will both have similar physical and chemical properties? Why or why not? 11. An 18-L sample of element A (density 0.84 g/mL combines completely with a 4-L sample of element B (density ...
Elements Combine to Form Compounds
... A new color appears Heat or light is given off during the change Bubbles or gas are formed Solid clumps (precipitate) forms in the liquid The change is difficult to reverse ...
... A new color appears Heat or light is given off during the change Bubbles or gas are formed Solid clumps (precipitate) forms in the liquid The change is difficult to reverse ...
Naming Compounds
... A new color appears Heat or light is given off during the change Bubbles or gas are formed Solid clumps (precipitate) forms in the liquid The change is difficult to reverse ...
... A new color appears Heat or light is given off during the change Bubbles or gas are formed Solid clumps (precipitate) forms in the liquid The change is difficult to reverse ...
Atomic Structure - Madison County Schools
... Electrons are negatively charged particles that surround the atom's nucleus. Electrons were discovered by J. J. Thomson in 1897. Electrons determine properties of the atom. Chemical reactions involve sharing or exchanging electrons. ...
... Electrons are negatively charged particles that surround the atom's nucleus. Electrons were discovered by J. J. Thomson in 1897. Electrons determine properties of the atom. Chemical reactions involve sharing or exchanging electrons. ...
HISTORICAL OVERVIEW OF THE ATOM
... The number of protons in an atom is equal to the number of electrons, to balance the charge. ...
... The number of protons in an atom is equal to the number of electrons, to balance the charge. ...
Distinguishing Among Atoms
... Isotopes are atoms of the same element having different masses due to varying numbers of neutrons. Isotope Hydrogen–1 ...
... Isotopes are atoms of the same element having different masses due to varying numbers of neutrons. Isotope Hydrogen–1 ...