ch. 4 atomic structure
... Bohr’s model suggests that electrons move with constant speed in fixed orbits around the nucleus. Each electron has a specific amount of energy. If it gains or loses energy, the electron energy can change. These possible energies that electrons can have are referred to as energy levels. No two eleme ...
... Bohr’s model suggests that electrons move with constant speed in fixed orbits around the nucleus. Each electron has a specific amount of energy. If it gains or loses energy, the electron energy can change. These possible energies that electrons can have are referred to as energy levels. No two eleme ...
Atomic structure
... happy (& chemically stable) some atoms will give up something. • Looking at the atom, what is easier to give up, protons, neutrons, or electrons? • Electrons are the easiest, because they are on the outside! ...
... happy (& chemically stable) some atoms will give up something. • Looking at the atom, what is easier to give up, protons, neutrons, or electrons? • Electrons are the easiest, because they are on the outside! ...
q2-w4-hw-atomic-vocab - PARADE 7/8 STEM
... 15. The _______________ is always a whole number. A. Atomic number B. Mass number C. Atomic mass 16. To get the number of neutrons for an element, we take the _____ and subtract the ______. A. mass number minus the atomic number B. atomic number minus the mass number 17. In the case of Sodium, calcu ...
... 15. The _______________ is always a whole number. A. Atomic number B. Mass number C. Atomic mass 16. To get the number of neutrons for an element, we take the _____ and subtract the ______. A. mass number minus the atomic number B. atomic number minus the mass number 17. In the case of Sodium, calcu ...
Mixtures, Pure Substance and Isotopes
... from atomic number of N = 7 7 protons isotope number – atomic number (= 16-7) 9 neutrons number of protons = no. of electrons 7 electrons ...
... from atomic number of N = 7 7 protons isotope number – atomic number (= 16-7) 9 neutrons number of protons = no. of electrons 7 electrons ...
Background Information: The periodic table is arranged in order of
... The electronegativity decreases as you go down a group. This is due to the shielding effect where electrons in lower energy levels shield the positive charge of the nucleus from outer electrons resulting in those outer electrons not being as tightly bound to the atom. Electronegativity increases as ...
... The electronegativity decreases as you go down a group. This is due to the shielding effect where electrons in lower energy levels shield the positive charge of the nucleus from outer electrons resulting in those outer electrons not being as tightly bound to the atom. Electronegativity increases as ...
Student Exploration Sheet: Growing Plants
... ). The electrons in the outermost orbit, called valence electrons, help to create chemical bonds. Create a lithium atom (3 protons, 4 neutrons, 3 electrons). How many valence electrons are in a neutral lithium atom? ___________ 4. Diagram: Turn on Show electron dot diagram. The valence electrons of ...
... ). The electrons in the outermost orbit, called valence electrons, help to create chemical bonds. Create a lithium atom (3 protons, 4 neutrons, 3 electrons). How many valence electrons are in a neutral lithium atom? ___________ 4. Diagram: Turn on Show electron dot diagram. The valence electrons of ...
Chapter 9 - profpaz.com
... 2. Argon (Ar) has 18 protons, 18 electrons and 22 neutrons. Write a formula designation for an argon atom. Atomic number = Mass number = protons + neutrons = ...
... 2. Argon (Ar) has 18 protons, 18 electrons and 22 neutrons. Write a formula designation for an argon atom. Atomic number = Mass number = protons + neutrons = ...
Protons, Neutrons and Electrons
... It is the smaller, whole number in a square on the periodic table for one element. It states the number of protons. ...
... It is the smaller, whole number in a square on the periodic table for one element. It states the number of protons. ...
The Periodic Table
... He noticed the same “periodic” pattern as Newlands. By arranging the elements in order of increasing atomic mass into columns with similar properties Mendeleev credited the first periodic table. He predicted the properties of scandium, gallium, and germanium. ...
... He noticed the same “periodic” pattern as Newlands. By arranging the elements in order of increasing atomic mass into columns with similar properties Mendeleev credited the first periodic table. He predicted the properties of scandium, gallium, and germanium. ...
Document
... ______ b (halogen) 15) The Noble Gases are a very reactive group of mostly nonmetals whose atoms gain or share one electron in chemical reactions. a) True b) False ______ b (metals) 16) Nonmetals are good conductors of heat and electricity. a) True b) False ______ b (increasing) 17) From left to rig ...
... ______ b (halogen) 15) The Noble Gases are a very reactive group of mostly nonmetals whose atoms gain or share one electron in chemical reactions. a) True b) False ______ b (metals) 16) Nonmetals are good conductors of heat and electricity. a) True b) False ______ b (increasing) 17) From left to rig ...
Bohr model
... Heavier atoms have more protons in the nucleus, and more electrons to cancel the charge. Bohr's idea was that each discrete orbit could only hold a certain number of electrons. After that orbit is full, the next level would have to be used. This gives the atom a shell structure, in which each shell ...
... Heavier atoms have more protons in the nucleus, and more electrons to cancel the charge. Bohr's idea was that each discrete orbit could only hold a certain number of electrons. After that orbit is full, the next level would have to be used. This gives the atom a shell structure, in which each shell ...
Chapter 3: Sections 3.1-3.7
... Atomic mass number and mass § Atomic mass, even for a single isotope, isn’t exactly equal to the sum of masses of neutrons, protons, and electrons: § about 0.1% difference in weights of neutron and proton § Difference is the binding energy of nucleus: § 4He nucleus (2 p + 2 n) has 28 MeV bi ...
... Atomic mass number and mass § Atomic mass, even for a single isotope, isn’t exactly equal to the sum of masses of neutrons, protons, and electrons: § about 0.1% difference in weights of neutron and proton § Difference is the binding energy of nucleus: § 4He nucleus (2 p + 2 n) has 28 MeV bi ...
ATOMIC STRUCTURE questions
... PROTONS have a positive (+) charge, ELECTRONS have a negative (-) charge and NEUTRONS have no charge. The most important fact about an element is the number of PROTONS, which it has in its nucleus; this is equal to the ATOMIC NUMBER or PROTON NUMBER of the element ...
... PROTONS have a positive (+) charge, ELECTRONS have a negative (-) charge and NEUTRONS have no charge. The most important fact about an element is the number of PROTONS, which it has in its nucleus; this is equal to the ATOMIC NUMBER or PROTON NUMBER of the element ...
Week 9 CCA Test Review
... Why do elements with similar valence level of electrons have similar chemical properties? They will react the same way, because they ...
... Why do elements with similar valence level of electrons have similar chemical properties? They will react the same way, because they ...
Chapter 2 Chemistry of Life ppt.
... pure water and have a pH below 7. • Bases: contain lower [ ] of H+ ions than pure water and have pH values above 7. ...
... pure water and have a pH below 7. • Bases: contain lower [ ] of H+ ions than pure water and have pH values above 7. ...
Atomic Structure and the Elements
... The largest number (with decimal) is the Atomic Mass # and is the weight of the atom and how many (+) and (n) are in the nucleus The smaller number (no decimal) is the Atomic # and is the number of (+) or (-). REMEMBER the number of (+) and (-) should always be ...
... The largest number (with decimal) is the Atomic Mass # and is the weight of the atom and how many (+) and (n) are in the nucleus The smaller number (no decimal) is the Atomic # and is the number of (+) or (-). REMEMBER the number of (+) and (-) should always be ...
Dmitri Mendeleev
... Naturally occurring neon contains three different isotopes: Ne-20 (with 10 protons and 10 neutrons), Ne-21 (with 10 protons and 11 neutrons), and Ne-22 (with 10 protons and 12 neutrons). ...
... Naturally occurring neon contains three different isotopes: Ne-20 (with 10 protons and 10 neutrons), Ne-21 (with 10 protons and 11 neutrons), and Ne-22 (with 10 protons and 12 neutrons). ...
Chapter 5 - EZWebSite
... An ion is an atom or group of atoms with a positive or negative charge. As we move from left to right across a period, does ionization energy go up or down? ...
... An ion is an atom or group of atoms with a positive or negative charge. As we move from left to right across a period, does ionization energy go up or down? ...
Structure of the Atom - Models
... 3. John Dalton (1808) – English school teacher - Widely accepted atomic theory due to supporting evidence. - 3 main points a. Every element is made of tiny unique particles (atoms) that cannot be divided. b. Atoms of the same element are exactly alike. c. Atoms of different elements can join to form ...
... 3. John Dalton (1808) – English school teacher - Widely accepted atomic theory due to supporting evidence. - 3 main points a. Every element is made of tiny unique particles (atoms) that cannot be divided. b. Atoms of the same element are exactly alike. c. Atoms of different elements can join to form ...
Atomic Theory - Part 1 History
... • A quantum of energy is the amount of energy required to move an electron from its present energy level to the next higher one. • The higher the electron is on energy ladder, the farther it is from nucleus ...
... • A quantum of energy is the amount of energy required to move an electron from its present energy level to the next higher one. • The higher the electron is on energy ladder, the farther it is from nucleus ...
Matter is Made up of Atoms
... Wrote extensively on many subjects Rejected Democritus’ idea that the “nothingness” of empty space could exist His ...
... Wrote extensively on many subjects Rejected Democritus’ idea that the “nothingness” of empty space could exist His ...
VIBRATIONS AND WAVES
... The first periodic table is mostly credited to (5) ___________________. In his table, the elements were arranged according to increasing (6) ___________________. One important result of this table was that the existence and properties of undiscovered (7) _________________ could be predicted. The ele ...
... The first periodic table is mostly credited to (5) ___________________. In his table, the elements were arranged according to increasing (6) ___________________. One important result of this table was that the existence and properties of undiscovered (7) _________________ could be predicted. The ele ...
Slide 1 - Effingham County Schools
... • Aristotle was wrong. However, his theory persisted for 2000 years. ...
... • Aristotle was wrong. However, his theory persisted for 2000 years. ...