module for international standard class
... 2. The Octet Law The tendency of atoms in molecules have eight electrons in their valence shells. (Ne , Ar , Kr , Xe , Rn) 3. The Duplet Law All of the noble gases except helium possess eight valence elctrons which is the maximum number possible. Helium’s valence electron configuration is 152. 4. Co ...
... 2. The Octet Law The tendency of atoms in molecules have eight electrons in their valence shells. (Ne , Ar , Kr , Xe , Rn) 3. The Duplet Law All of the noble gases except helium possess eight valence elctrons which is the maximum number possible. Helium’s valence electron configuration is 152. 4. Co ...
Chapter 18 Comparing Atoms Lab
... 10. Playing the game of atomic Challenge. Each player takes a turn adding protons, neutrons, and electrons to the atom to build heavier and heavier elements. The winner is the first player to run completely out of marbles. Play a few games until everyone in your group is proficient. a. Each player s ...
... 10. Playing the game of atomic Challenge. Each player takes a turn adding protons, neutrons, and electrons to the atom to build heavier and heavier elements. The winner is the first player to run completely out of marbles. Play a few games until everyone in your group is proficient. a. Each player s ...
Atomic number, atomic mass and isotopes
... Appendix B and check out the atomic numbers and atomic masses of your favourite elements. Isotopes. Isotopes are atoms of the same element that have different atomic masses; they have the same number of protons, but different numbers of neutrons. Look at the element chlorine in Appendix B. Its atomi ...
... Appendix B and check out the atomic numbers and atomic masses of your favourite elements. Isotopes. Isotopes are atoms of the same element that have different atomic masses; they have the same number of protons, but different numbers of neutrons. Look at the element chlorine in Appendix B. Its atomi ...
The Atom
... 3. Rays deflected by magnet- not light 4. Rays deflected by negative charge- therefore cathode rays are made up of negatively charged particles called electrons. ...
... 3. Rays deflected by magnet- not light 4. Rays deflected by negative charge- therefore cathode rays are made up of negatively charged particles called electrons. ...
Atomic Theory Class #5
... 4 Earnest J. Rutherford, discovered the nucleus, created first modern atomic model with electrons outside the nucleus, atom is mostly empty space 5 Niels Bohr, the physicist/mathematician/chemist who detailed the math to prove Rutherford’s model was correct. Proved electrons don’t lose energy, and l ...
... 4 Earnest J. Rutherford, discovered the nucleus, created first modern atomic model with electrons outside the nucleus, atom is mostly empty space 5 Niels Bohr, the physicist/mathematician/chemist who detailed the math to prove Rutherford’s model was correct. Proved electrons don’t lose energy, and l ...
Review Unit - hrsbstaff.ednet.ns.ca
... Remember that the unit for energy is the Joule (J). b) Physical State - Chemical reactions often depend on the physical state of the chemicals involved. This information can be included in an equation by using these symbols: (s) = solid (l) = liquid (g) = gas (a) = aqueous (dissolved in water) For e ...
... Remember that the unit for energy is the Joule (J). b) Physical State - Chemical reactions often depend on the physical state of the chemicals involved. This information can be included in an equation by using these symbols: (s) = solid (l) = liquid (g) = gas (a) = aqueous (dissolved in water) For e ...
Chemistry Readings
... Electrons are arranged in shells (shown as circles around the nucleus). The shells are also called energy levels or orbitals. We will use the term shell. Chemists use letters to name the shells around a nucleus. They use the letters "k, l, m, n, o, p, and q". The "k" shell is the one closest to the ...
... Electrons are arranged in shells (shown as circles around the nucleus). The shells are also called energy levels or orbitals. We will use the term shell. Chemists use letters to name the shells around a nucleus. They use the letters "k, l, m, n, o, p, and q". The "k" shell is the one closest to the ...
Unit 2 Atomic Theory
... Half-Life (t1/2) - time required for one half of the original sample of nuclei to decay. •The half-life of Ra-223 is 12 days. If you start with 100.0 grams of Ra-223, how much will be left after 36 days? 100.0 g 50.00 g 25.00 g 12.50 g •The half life of Ra-225 is 15 minutes. If you have 10.0 ...
... Half-Life (t1/2) - time required for one half of the original sample of nuclei to decay. •The half-life of Ra-223 is 12 days. If you start with 100.0 grams of Ra-223, how much will be left after 36 days? 100.0 g 50.00 g 25.00 g 12.50 g •The half life of Ra-225 is 15 minutes. If you have 10.0 ...
File
... 6. a. Properties of most of the group 1 elements include the following: • They are soft, shiny, and silvery in colour. • They are very reactive with water. • Compounds tend to be white solids that are soluble in water. b. Group 1 elements are called alkali metals. c. Although hydrogen is part of co ...
... 6. a. Properties of most of the group 1 elements include the following: • They are soft, shiny, and silvery in colour. • They are very reactive with water. • Compounds tend to be white solids that are soluble in water. b. Group 1 elements are called alkali metals. c. Although hydrogen is part of co ...
CHEM A Midterm Review
... 1.4 I can describe the charge and location of protons, neutrons, and electrons within the nucleus and shells of an atom. The periodic table is, in many ways, the world’s greatest cheat sheet. The periodic table lists all of the elements (simple substances that make up more complex materials) like go ...
... 1.4 I can describe the charge and location of protons, neutrons, and electrons within the nucleus and shells of an atom. The periodic table is, in many ways, the world’s greatest cheat sheet. The periodic table lists all of the elements (simple substances that make up more complex materials) like go ...
Investigating Atoms and Atomic Theory
... however, did bounce away from the gold sheet as if they had hit ...
... however, did bounce away from the gold sheet as if they had hit ...
Document
... They are made up of a combination of different elements. Remember – there are only 118 total elements, but MILLIONS and MILLIONS of ...
... They are made up of a combination of different elements. Remember – there are only 118 total elements, but MILLIONS and MILLIONS of ...
Document
... majority of the particles did pass directly through the foil, but some particles were deflected, and some (approximately 1 in 20,000) even bounced back. ...
... majority of the particles did pass directly through the foil, but some particles were deflected, and some (approximately 1 in 20,000) even bounced back. ...
File
... All atoms of the same element will always have the same number of protons. Protons determine the identity of the element. Different atoms of an element may have different numbers of electrons; this forms ions. Atoms may also differ in their number of neutrons, creating isotopes. Isotopes of the same ...
... All atoms of the same element will always have the same number of protons. Protons determine the identity of the element. Different atoms of an element may have different numbers of electrons; this forms ions. Atoms may also differ in their number of neutrons, creating isotopes. Isotopes of the same ...
Ch. 4 Notes – THE STRUCTURE OF THE ATOM NOTE
... a) adapted model with subatomic particles: protons and electrons b) “plum pudding” model—electrons stuck in a proton lump 3) E. Rutherford (1871-1937); model in 1911 a) nucleus as the dense center with p+ and n0; e- outside it b) the atom is mostly space (gold foil experiment) 4) Niels Bohr (1885-19 ...
... a) adapted model with subatomic particles: protons and electrons b) “plum pudding” model—electrons stuck in a proton lump 3) E. Rutherford (1871-1937); model in 1911 a) nucleus as the dense center with p+ and n0; e- outside it b) the atom is mostly space (gold foil experiment) 4) Niels Bohr (1885-19 ...
Bean Bag Lab
... Introduction: John Dalton’s atomic theory that stated all atoms of the same element are identical and equal in mass was simple yet revolutionary. Unfortunately, it was not quite right. More research started to show that atoms of the same element could have different masses. These atoms were call iso ...
... Introduction: John Dalton’s atomic theory that stated all atoms of the same element are identical and equal in mass was simple yet revolutionary. Unfortunately, it was not quite right. More research started to show that atoms of the same element could have different masses. These atoms were call iso ...
Atom notes - WordPress.com
... ELEMENT: One of the __________ known _____________ substances. Listed on the periodic table. ATOM: ______________________ piece of matter that still retains the properties of that matter. ______________________ in the world is made of atoms. NUCLEUS: _________________ of the atom; _________________ ...
... ELEMENT: One of the __________ known _____________ substances. Listed on the periodic table. ATOM: ______________________ piece of matter that still retains the properties of that matter. ______________________ in the world is made of atoms. NUCLEUS: _________________ of the atom; _________________ ...
![The atom: Isotopes (Grade 10) [NCS]](http://s1.studyres.com/store/data/016109524_1-1437871a54cd24e5ee13c27e98f0719d-300x300.png)
The atom: Isotopes (Grade 10) [NCS]
... elements as X-A where the X is the element symbol and the A is the atomic mass of that element. ...
... elements as X-A where the X is the element symbol and the A is the atomic mass of that element. ...
SOLUBILITY RULES FOR IONIC COMPOUNDS IN WATER
... 1. Identify the scientist responsible for each of the following: (a) first to propose that matter is composed of atoms (b) identified matter as being composed of either elements or compounds (c) showed that mass is conserved during chemical reactions (d) proposed that compounds always contain the sa ...
... 1. Identify the scientist responsible for each of the following: (a) first to propose that matter is composed of atoms (b) identified matter as being composed of either elements or compounds (c) showed that mass is conserved during chemical reactions (d) proposed that compounds always contain the sa ...
Bonding Nomenclature Notes
... 1. Polar Covalent Bond -one atom in a molecule is significantly more electronegative -This causes a slight positive and negative charge on a molecule. 2. Nonpolar Covalent Bond -electrons are shared ...
... 1. Polar Covalent Bond -one atom in a molecule is significantly more electronegative -This causes a slight positive and negative charge on a molecule. 2. Nonpolar Covalent Bond -electrons are shared ...
Chapter 4:ааAtomic Structure Section 4.1анаDefining the Atom
... Dalton’s Atomic Theory ● John Dalton: English chemist and school teacher (17661844) ● by using experimental methods, Dalton transformed Democritus’s ideas on atoms into a scientific theory ○ studied the ratios in which elements combine in chemical reactions ● Dalton’s Atomic Theory ○ all ele ...
... Dalton’s Atomic Theory ● John Dalton: English chemist and school teacher (17661844) ● by using experimental methods, Dalton transformed Democritus’s ideas on atoms into a scientific theory ○ studied the ratios in which elements combine in chemical reactions ● Dalton’s Atomic Theory ○ all ele ...
Chapter 5 Atomic Structure and Periodic Table 2014
... Are these isotopes? If the blue spheres are the neutrons and the burgundy spheres are the protons, are these three items isotopes of an element? By the way, how many electrons does this atom have? ...
... Are these isotopes? If the blue spheres are the neutrons and the burgundy spheres are the protons, are these three items isotopes of an element? By the way, how many electrons does this atom have? ...
Periodic Properties of the Elements
... Melting and boiling points increase with increasing atomic number ...
... Melting and boiling points increase with increasing atomic number ...