Atomic number
... equal, but opposite, charge as an electron When one or more electrons are lost from an atom, a positive cation is formed. When one or more electrons are added to a neutral atom, an anion is formed. The word ‘cation’ comes from the fact that positive ion (cation) moves towards negativelycharged (cath ...
... equal, but opposite, charge as an electron When one or more electrons are lost from an atom, a positive cation is formed. When one or more electrons are added to a neutral atom, an anion is formed. The word ‘cation’ comes from the fact that positive ion (cation) moves towards negativelycharged (cath ...
GHW - Louisiana Tech University
... High school chemistry: Definition of matter. Scientific method, Dalton’s Atomic theory, Components of atoms: nucleus (proton and neutrons) and electrons. Atoms, molecules and ions. New Concepts ...
... High school chemistry: Definition of matter. Scientific method, Dalton’s Atomic theory, Components of atoms: nucleus (proton and neutrons) and electrons. Atoms, molecules and ions. New Concepts ...
Atoms of different elements are
... Use symbols: A= mass number, Z=atomic number Use notation for writing isotope symbols: 235 or U-235 92 U Identify isotope using mass number and atomic number and relate to number of protons, neutrons and electrons Have a conceptual awareness of the nature of average atomic mass. (Relative abundance ...
... Use symbols: A= mass number, Z=atomic number Use notation for writing isotope symbols: 235 or U-235 92 U Identify isotope using mass number and atomic number and relate to number of protons, neutrons and electrons Have a conceptual awareness of the nature of average atomic mass. (Relative abundance ...
Chemistry
... The atomic mass unit (amu) is defined as 1/12 the mass of a carbon – 12 atom (element is named by its name and atomic mass number) C – 12 has 6 protons and 6 neutrons so the mass of a single proton or neutron is 1 amu Most mass numbers in the periodic table are not whole numbers because in nature mo ...
... The atomic mass unit (amu) is defined as 1/12 the mass of a carbon – 12 atom (element is named by its name and atomic mass number) C – 12 has 6 protons and 6 neutrons so the mass of a single proton or neutron is 1 amu Most mass numbers in the periodic table are not whole numbers because in nature mo ...
Nuclear Chemistry powerpoint
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
I. Atoms
... • Dalton’s Atomic Theory: developed ~ 1800; based on experiments 1. Each element is composed of tiny *indivisible* particles called atoms. 2. All atoms of a given element are *identical.* Atoms of different elements are unique. 3. Atoms of different elements combine in simple whole number ratios to ...
... • Dalton’s Atomic Theory: developed ~ 1800; based on experiments 1. Each element is composed of tiny *indivisible* particles called atoms. 2. All atoms of a given element are *identical.* Atoms of different elements are unique. 3. Atoms of different elements combine in simple whole number ratios to ...
Atoms Notes Matter: anything that has mass and takes up space 3
... ______________ particles; have ________ electric charge ...
... ______________ particles; have ________ electric charge ...
Ch 17 Properties of Atoms - Effingham County Schools
... Each small square on the periodic table shows the name of one element and the letter symbol for that element. The elements are arranged based on the number of protons an atom of that element has in its nucleus. Periodic law states that when elements are arranged this way, similarities in their ...
... Each small square on the periodic table shows the name of one element and the letter symbol for that element. The elements are arranged based on the number of protons an atom of that element has in its nucleus. Periodic law states that when elements are arranged this way, similarities in their ...
Nuclear Chemistry powerpoint
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
NOTES: ATOMIC THEORY
... of protons) 1 photon (no mass/no charge, carries electromagnetic force) Four Universal Forces (in order of strength, from the strongest to the weakest): 1. Strong nuclear force (holds p+ & no together in nucleus since same charges repel) 2. Weak nuclear force (responsible for nuclear (radioactive) d ...
... of protons) 1 photon (no mass/no charge, carries electromagnetic force) Four Universal Forces (in order of strength, from the strongest to the weakest): 1. Strong nuclear force (holds p+ & no together in nucleus since same charges repel) 2. Weak nuclear force (responsible for nuclear (radioactive) d ...
A time line discussion on the discovery of radioactivity and isotopes
... of helium atoms. He does this by finding that the charge-to-mass ratio is actually twice that of a hydrogen ion. This might mean that the charge is the same as hydrogen and therfore the weight is twice that of hydrogen. However, there is no element with a weight of two. Rutherford reasons that the a ...
... of helium atoms. He does this by finding that the charge-to-mass ratio is actually twice that of a hydrogen ion. This might mean that the charge is the same as hydrogen and therfore the weight is twice that of hydrogen. However, there is no element with a weight of two. Rutherford reasons that the a ...
Chapter 2 Notes - Waterford Public Schools
... of the first element can always be reduced to small whole numbers. • Discovered by John Dalton ...
... of the first element can always be reduced to small whole numbers. • Discovered by John Dalton ...
Nuclear Chemistry powerpoint
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
... ) and no charge ( ). Thus, it causes change in or numbers. Gamma rays almost accompany alpha and beta radiation. However, since there is effect on mass number or atomic number, they are usually from nuclear equations. ...
Chapter 28
... This formula really only works for elements with an atomic number > 20. For example, 14C is radioactive, but the ratio 8 N / 6 P = 1.33. Elements with Z < 20 generally decay by β decay. Elements with Z > 83 are always radioactive. In other words, for Po (Polonium, named by Marie Curie for her na ...
... This formula really only works for elements with an atomic number > 20. For example, 14C is radioactive, but the ratio 8 N / 6 P = 1.33. Elements with Z < 20 generally decay by β decay. Elements with Z > 83 are always radioactive. In other words, for Po (Polonium, named by Marie Curie for her na ...
Unit 1: Atoms, Molecules, and Ions
... cathode ray beam could be deflected using either an external magnetic or electric field Based on the direction of the beam deflection, he concluded it carried negative charge ...
... cathode ray beam could be deflected using either an external magnetic or electric field Based on the direction of the beam deflection, he concluded it carried negative charge ...
Isotope
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos (ἴσος ""equal"") and topos (τόπος ""place""), meaning ""the same place""; thus, the meaning behind the name it is that different isotopes of a single element occupy the same position on the periodic table. The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in the neutral (non-ionized) atom. Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. The atomic number of carbon is 6, which means that every carbon atom has 6 protons, so that the neutron numbers of these isotopes are 6, 7 and 8 respectively.