Chapter 4
... The elements are represented by their symbols and are placed in order based on the number of protons an atom of that element has in its nucleus. ...
... The elements are represented by their symbols and are placed in order based on the number of protons an atom of that element has in its nucleus. ...
atomic structure
... • Electrons have very little mass • Electrons are found in “shells” or energy levels • Electrons can move out of their positions ...
... • Electrons have very little mass • Electrons are found in “shells” or energy levels • Electrons can move out of their positions ...
Atoms and the Periodic Table PowerPoint
... in the table, he predicted a new element would one day be found and deduced its properties. And he was right. Three of those elements were found during his lifetime: gallium, scandium, and germanium. ...
... in the table, he predicted a new element would one day be found and deduced its properties. And he was right. Three of those elements were found during his lifetime: gallium, scandium, and germanium. ...
Chapter 1 Notes: The Science of Chemistry
... o Number of waves (cycles) which pass a given point in one second Electron Configuration in the Atom Ground state- electrons in their lowest possible energy level around the atom (normal) Excited state- electrons that have absorbed energy and jumped to a higher energy level (will eventually drop ...
... o Number of waves (cycles) which pass a given point in one second Electron Configuration in the Atom Ground state- electrons in their lowest possible energy level around the atom (normal) Excited state- electrons that have absorbed energy and jumped to a higher energy level (will eventually drop ...
Atomic Structure
... teacher, John Dalton developed the first atomic theory • His theory was successful because it was supported with scientific evidence • By using experimental methods, Dalton transformed Democritus’ ideas on atoms into a scientific theory. • His theory has 4 main points ...
... teacher, John Dalton developed the first atomic theory • His theory was successful because it was supported with scientific evidence • By using experimental methods, Dalton transformed Democritus’ ideas on atoms into a scientific theory. • His theory has 4 main points ...
投影片 - 中正大學化生系
... over 1000 times lighter than the hydrogen atom, but also that their mass was the same whatever type of atom they came from. 2. He concluded that the rays were composed of very light, negatively charged particles which were a universal building block of atoms. 3. He determined the charge-to-mass rati ...
... over 1000 times lighter than the hydrogen atom, but also that their mass was the same whatever type of atom they came from. 2. He concluded that the rays were composed of very light, negatively charged particles which were a universal building block of atoms. 3. He determined the charge-to-mass rati ...
Bohr – Rutherford Diagrams
... maximum of 2 dots). Each dot represents 1 electron; if the atom contains more than 2 electrons, draw a second circle around the first one and draw small dots on this second energy level (up to a maximum of 8 dots). Each dot represents an electron; as appropriate, draw more energy level lines accordi ...
... maximum of 2 dots). Each dot represents 1 electron; if the atom contains more than 2 electrons, draw a second circle around the first one and draw small dots on this second energy level (up to a maximum of 8 dots). Each dot represents an electron; as appropriate, draw more energy level lines accordi ...
Atomic Theory - WaylandHighSchoolChemistry
... • Atom is mostly empty space – first nuclear model ...
... • Atom is mostly empty space – first nuclear model ...
Atomic History
... 1913Bohr said electrons located outside the nucleus could only be located in specific paths called orbitals. This was supported by the line spectra of atoms His model is called the planetary model ...
... 1913Bohr said electrons located outside the nucleus could only be located in specific paths called orbitals. This was supported by the line spectra of atoms His model is called the planetary model ...
Ionization energy
... Organizing the Elements Cont. - slight modifications of He; nothing in common with the 2nd elements of the other periods - Helium moves right until it is aligned with other similar elements such as Ne, Ar, and other ...
... Organizing the Elements Cont. - slight modifications of He; nothing in common with the 2nd elements of the other periods - Helium moves right until it is aligned with other similar elements such as Ne, Ar, and other ...
Atoms and the Periodic Table
... table by increasing atomic number. 1. In the late 1800’s, Dmitri Mendeleev devised the first periodic table based on atomic mass. 2. In 1913, Henry G.J. Moseley arranged the elements by atomic number rather than atomic mass. ...
... table by increasing atomic number. 1. In the late 1800’s, Dmitri Mendeleev devised the first periodic table based on atomic mass. 2. In 1913, Henry G.J. Moseley arranged the elements by atomic number rather than atomic mass. ...
atomic number - Teacher Pages
... • The modern periodic table contains over 100 squares, one for each element, arranged in order of atomic number. • An element’s properties can be predicted from its location in the periodic table. – The elements in a column are called a group,or family. The groups are numbered 1-18. Elements in each ...
... • The modern periodic table contains over 100 squares, one for each element, arranged in order of atomic number. • An element’s properties can be predicted from its location in the periodic table. – The elements in a column are called a group,or family. The groups are numbered 1-18. Elements in each ...
Another look at chemical reactions HYDROGEN PEROXIDE WATER
... Example: Helium has an atomic number of 2. Every helium atom has two protons in its nucleus. - MASS NUMBER: The number of protons PLUS the number of neutrons in the atomic nucleus, Atoms of the same element may have DIFFERENT mass numbers. - ISOTOPES: are atoms of the same element with different mas ...
... Example: Helium has an atomic number of 2. Every helium atom has two protons in its nucleus. - MASS NUMBER: The number of protons PLUS the number of neutrons in the atomic nucleus, Atoms of the same element may have DIFFERENT mass numbers. - ISOTOPES: are atoms of the same element with different mas ...
CHEM 121 Chp 2 Spaulding
... The shells are numbers, n=1, 2, 3, 4… Moving out from the nucleus Electrons closer to the nucleus are held more tightly are lower in energy Electrons farther from the nucleus are held less tightly and are higher in energy The farther a shell is from the nucleus, the larger its volume, and the more e ...
... The shells are numbers, n=1, 2, 3, 4… Moving out from the nucleus Electrons closer to the nucleus are held more tightly are lower in energy Electrons farther from the nucleus are held less tightly and are higher in energy The farther a shell is from the nucleus, the larger its volume, and the more e ...
The ocean is a mixture.
... after the element that makes up 78% of our atmosphere. This family includes non-metals, metalloids and metals Atoms in the nitrogen family have 5 valence electrons. They tend to share electrons when they bond. Reactivity: Varies among elements Properties: All but nitrogen are ...
... after the element that makes up 78% of our atmosphere. This family includes non-metals, metalloids and metals Atoms in the nitrogen family have 5 valence electrons. They tend to share electrons when they bond. Reactivity: Varies among elements Properties: All but nitrogen are ...
ON THE INSIDE
... AGreek philosopher called Democritus, who lived over 2000 years ago, taught people that all things were made of grains which could not be divided. He called these grains atoms because in Greek atom means indivisible. Today, atom is the common name for the tiny particles of matter that cannot be furt ...
... AGreek philosopher called Democritus, who lived over 2000 years ago, taught people that all things were made of grains which could not be divided. He called these grains atoms because in Greek atom means indivisible. Today, atom is the common name for the tiny particles of matter that cannot be furt ...
Elements and Atoms
... atoms. While the atoms may have different weights and organization, they are all built in the same way. ...
... atoms. While the atoms may have different weights and organization, they are all built in the same way. ...
Atomic Timeline
... ► These orbits are specific distances from the nucleus ► Electron energy level model. ...
... ► These orbits are specific distances from the nucleus ► Electron energy level model. ...
Slide 1
... P. 124 – Q – 76 Rutherford’s atomic theory proposed a dense nucleus surrounded by very small electrons. This implies that atoms are composed mainly of empty space. If all matter is mainly empty space, why is it impossible to walk through walls or pass your hand through your desk? P. 122 – Q – 46 Wh ...
... P. 124 – Q – 76 Rutherford’s atomic theory proposed a dense nucleus surrounded by very small electrons. This implies that atoms are composed mainly of empty space. If all matter is mainly empty space, why is it impossible to walk through walls or pass your hand through your desk? P. 122 – Q – 46 Wh ...
Unit1: Matter Review
... compound. (Table 2 pg. 59). • If there is more than one atom of the element in a compound, the symbol is followed by a number (called a subscript). • Eg. H2O = Water (2 atoms of Hydrogen and 1 atom of oxygen) ...
... compound. (Table 2 pg. 59). • If there is more than one atom of the element in a compound, the symbol is followed by a number (called a subscript). • Eg. H2O = Water (2 atoms of Hydrogen and 1 atom of oxygen) ...
Workshop - History of Atomic Theory
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...
PowerPoint - Models of the Atom
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...
atomic models
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...
... when passed through an evacuated tube (demos). These rays have a small mass and are negative. Thompson noted that these negative subatomic particles were a fundamental part of all atoms. 1) Dalton’s “Billiard ball” model (1800-1900) Atoms are solid and indivisible. 2) Thompson “Plum pudding” model ( ...