Atomic Mass
... Atomic mass = 1 amu # of Protons = Atomic Number Neutrons (n): They have a neutral charge. Atomic mass = 1 amu # of Neutrons = (Atomic Mass) – (Atomic #) Electrons (-): They have a negative charge. Very small mass & are located in different energy level shells # of Electrons = Number of protons ...
... Atomic mass = 1 amu # of Protons = Atomic Number Neutrons (n): They have a neutral charge. Atomic mass = 1 amu # of Neutrons = (Atomic Mass) – (Atomic #) Electrons (-): They have a negative charge. Very small mass & are located in different energy level shells # of Electrons = Number of protons ...
Ess Chem - 2013
... - Neils Bohr’s model confines electrons to energy levels. Electrons can be only certain distances from the nucleus. Each distance corresponds to a certain quantity of energy that an electron can have. We call this the quantum energy model of an atom. - De Broglie suggested that electrons could be co ...
... - Neils Bohr’s model confines electrons to energy levels. Electrons can be only certain distances from the nucleus. Each distance corresponds to a certain quantity of energy that an electron can have. We call this the quantum energy model of an atom. - De Broglie suggested that electrons could be co ...
electron configuration
... • Heisenberg showed it is impossible to take any measurement of an object without disturbing it. • The Heisenberg uncertainty principle states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time. ...
... • Heisenberg showed it is impossible to take any measurement of an object without disturbing it. • The Heisenberg uncertainty principle states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time. ...
unit 4 hw packet File
... conductors. Have one e- in their outer energy level which they like to give up. Never found uncombined in nature. Reactivity increases down a group. Alkali Earth Metals: Group 2, similar characteristics as alkali metals but not quite as reactive. They have 2 electrons in the outer level which they l ...
... conductors. Have one e- in their outer energy level which they like to give up. Never found uncombined in nature. Reactivity increases down a group. Alkali Earth Metals: Group 2, similar characteristics as alkali metals but not quite as reactive. They have 2 electrons in the outer level which they l ...
Chapter 3 Notes 2015
... • If two or more different compounds are composed of the same two elements then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers ...
... • If two or more different compounds are composed of the same two elements then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers ...
Atoms in the Periodic Table
... Look at any periodic table and you will see that elements are arranged from left to right and top to bottom in order of increasing atomic number. ...
... Look at any periodic table and you will see that elements are arranged from left to right and top to bottom in order of increasing atomic number. ...
Atomic structure practice worksheet Atomic Calculating the atomic
... 18. Which is the lowest energy level that can have an s orbital? 19. Which is the lowest energy level that can have a p orbital? 20. Is it possible for two electrons in the same atom to have exactly the same set of quantum numbers? 21. Distinguish between an atom in its ground state and an excited a ...
... 18. Which is the lowest energy level that can have an s orbital? 19. Which is the lowest energy level that can have a p orbital? 20. Is it possible for two electrons in the same atom to have exactly the same set of quantum numbers? 21. Distinguish between an atom in its ground state and an excited a ...
Bohr and Dot Diagrams Powerpoint
... Cation – An ion with a net positive charge, due to the loss of one or more electrons from a neutral atom. Usually formed by metals. Example: Sodium atom, Na, can readily lose an electron to become a sodium cation, Na+ Anion – An ion whose net charge is negative due to an increase in the number of el ...
... Cation – An ion with a net positive charge, due to the loss of one or more electrons from a neutral atom. Usually formed by metals. Example: Sodium atom, Na, can readily lose an electron to become a sodium cation, Na+ Anion – An ion whose net charge is negative due to an increase in the number of el ...
Unit 3 Review - RHSChemistry
... 11. General properties (similar to other metals) are… a.Most transition metals are _____ _____ melting points. hardsolids with high b.Transition metal unpaired d-electrons have the ability to move into the s __ level. Because of this, many transition metals can form several different charged ions. c ...
... 11. General properties (similar to other metals) are… a.Most transition metals are _____ _____ melting points. hardsolids with high b.Transition metal unpaired d-electrons have the ability to move into the s __ level. Because of this, many transition metals can form several different charged ions. c ...
Slide 1
... • In many cases you can determine the most abundant isotope of an element by rounding the atomic mass to the nearest whole number. • The atomic mass of carbon is 12.01 u so the most abundant isotope of carbon will have a mass number of 12 u. • The atomic mass is measured in atomic mass units (u). ...
... • In many cases you can determine the most abundant isotope of an element by rounding the atomic mass to the nearest whole number. • The atomic mass of carbon is 12.01 u so the most abundant isotope of carbon will have a mass number of 12 u. • The atomic mass is measured in atomic mass units (u). ...
Chapter 4 Chemical Foundations: Elements, Atoms, and Ions
... Symbols don’t always match up with English names Because use Greek and Latin words ...
... Symbols don’t always match up with English names Because use Greek and Latin words ...
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 – Elements
... electron has a weaker pull on it from the nucleus and therefore the electrons can move further away from the nucleus. Positive or metallic ions have radii that are smaller than their respective atoms for two reasons. When a metal loses electrons, it is losing its valence shell, and there are also fe ...
... electron has a weaker pull on it from the nucleus and therefore the electrons can move further away from the nucleus. Positive or metallic ions have radii that are smaller than their respective atoms for two reasons. When a metal loses electrons, it is losing its valence shell, and there are also fe ...
Classification – 3 main groups
... Magnetic Pole area where magnetic force is strongest, all magnets have 2, north and south Magnetic Force created by the magnetic field ; strongest at the poles Domain - areas within the magnet or magnetic material where all the atoms are aligned facing the same direction. This makes it a permanent m ...
... Magnetic Pole area where magnetic force is strongest, all magnets have 2, north and south Magnetic Force created by the magnetic field ; strongest at the poles Domain - areas within the magnet or magnetic material where all the atoms are aligned facing the same direction. This makes it a permanent m ...
Unit 7: Atomic Theory
... 1) J. J. Thomson - cathode (discharge) ray tube (put diagram on the board) Results: could get the negative particles to pop off the negative plate and migrate to the positive plate (opposites attract), but could not get positives to come off and migrate to the negative plate. • Got a discharge of el ...
... 1) J. J. Thomson - cathode (discharge) ray tube (put diagram on the board) Results: could get the negative particles to pop off the negative plate and migrate to the positive plate (opposites attract), but could not get positives to come off and migrate to the negative plate. • Got a discharge of el ...
Chemistry 11 – Course Outcomes
... Explain the hydrogen line spectrum in terms of Bohr Model of the atom State two differences between the Bohr model and the quantum mechanical model of the atom Draw an energy level diagram for a given atom Define valence shell and valence electrons Label the sublevels on an energy level diagram with ...
... Explain the hydrogen line spectrum in terms of Bohr Model of the atom State two differences between the Bohr model and the quantum mechanical model of the atom Draw an energy level diagram for a given atom Define valence shell and valence electrons Label the sublevels on an energy level diagram with ...
subatomic particles
... - Atomic mass unit (amu): 1 proton has a mass of 1 amu; determined by taking the mass of a Carbon-12 atom and dividing by the total number of particles. - Atomic number: the number of protons in an atom. - Mass number: the sum of the protons and neutrons in an atom. - Isotopes: atoms of the same ele ...
... - Atomic mass unit (amu): 1 proton has a mass of 1 amu; determined by taking the mass of a Carbon-12 atom and dividing by the total number of particles. - Atomic number: the number of protons in an atom. - Mass number: the sum of the protons and neutrons in an atom. - Isotopes: atoms of the same ele ...
Unit 2 - Test Review
... of the mass of the atom was contained in the small nucleus, and that the rest of the atom was mostly empty space. Rutherford came to this conclusion following the results of his famous gold foil experiment. This experiment involved the firing of radioactive particles through minutely thin metal foi ...
... of the mass of the atom was contained in the small nucleus, and that the rest of the atom was mostly empty space. Rutherford came to this conclusion following the results of his famous gold foil experiment. This experiment involved the firing of radioactive particles through minutely thin metal foi ...
Document
... — How many protons does this atom have? — How many neutrons? How do you know? — How many electrons? How do you know? ...
... — How many protons does this atom have? — How many neutrons? How do you know? — How many electrons? How do you know? ...
Recording Measurements
... (same period) Chlorine has one more proton in its nucleus, so it’s better at attracting electrons h. Potassium has a lower first ionization energy than calcium. (same period) K has one less proton in its nucleus, so it’s easier to pull an e- away ...
... (same period) Chlorine has one more proton in its nucleus, so it’s better at attracting electrons h. Potassium has a lower first ionization energy than calcium. (same period) K has one less proton in its nucleus, so it’s easier to pull an e- away ...
Chapter 4 Notes
... Originally it was thought that all atoms of the same element had the same mass (Dalton) Hydrogen was observed to have the lowest mass (assigned a weight of “1”). Original periodic table listed elements in order of their atomic This is not true today (see ...
... Originally it was thought that all atoms of the same element had the same mass (Dalton) Hydrogen was observed to have the lowest mass (assigned a weight of “1”). Original periodic table listed elements in order of their atomic This is not true today (see ...
Atomic - Ms. Dawkins
... • Electrons are much smaller than protons (2000 times smaller). • Electrons move around the nucleus very quickly. Scientists have found that it is not possible to determine the exact position of any single electron in an atom because they are moving too fast. This is why we picture electrons as a cl ...
... • Electrons are much smaller than protons (2000 times smaller). • Electrons move around the nucleus very quickly. Scientists have found that it is not possible to determine the exact position of any single electron in an atom because they are moving too fast. This is why we picture electrons as a cl ...
No Slide Title
... The metals in these two groups have similar outer electron configurations, with one electron in the outermost s orbital. Chemical properties are quite different due to difference in the ionization energy. ...
... The metals in these two groups have similar outer electron configurations, with one electron in the outermost s orbital. Chemical properties are quite different due to difference in the ionization energy. ...
The Periodic Table
... The atomic symbol is one or two letters chosen to represent an element ("H" for "hydrogen," etc.). These symbols are used every where in the world. The symbol is the abbreviation of the element or its Latin name of the element. ...
... The atomic symbol is one or two letters chosen to represent an element ("H" for "hydrogen," etc.). These symbols are used every where in the world. The symbol is the abbreviation of the element or its Latin name of the element. ...