atom
... • Suggested that the electrons orbiting the nucleus of atoms can only have certain discrete energies. • Electrons lose/gain energy in order to move from one energy level to another. • The emission of light (photon) occurs when an electron moves from a higher to a lower energy orbit (emission spectra ...
... • Suggested that the electrons orbiting the nucleus of atoms can only have certain discrete energies. • Electrons lose/gain energy in order to move from one energy level to another. • The emission of light (photon) occurs when an electron moves from a higher to a lower energy orbit (emission spectra ...
The Basics of Atomic Structure
... • An element will always have the same number of protons regardless of the number of neutrons and electrons. An element can be identified by its Atomic Number. • Isotopes are atoms with the same number of protons but a different number of neutrons; therefore, the mass number will be different but th ...
... • An element will always have the same number of protons regardless of the number of neutrons and electrons. An element can be identified by its Atomic Number. • Isotopes are atoms with the same number of protons but a different number of neutrons; therefore, the mass number will be different but th ...
Overview Atomic Structure
... everything was made of fire, earth, water and air. Only after over 1600 years did scientists realise matter was composed of different elements. ...
... everything was made of fire, earth, water and air. Only after over 1600 years did scientists realise matter was composed of different elements. ...
PPT_Topic2
... When chemicals are heated up the electrons inside the atoms get excited and move to energy levels further away from the nucleus. The electrons then move back to where they started but rather than giving the energy back out as heat they give it out as bands of light of a particular colour. As each el ...
... When chemicals are heated up the electrons inside the atoms get excited and move to energy levels further away from the nucleus. The electrons then move back to where they started but rather than giving the energy back out as heat they give it out as bands of light of a particular colour. As each el ...
ATOMS AND ELEMENTS Evolution of Atomic Theory
... ! We symbolize this ion as Al3+. ! Note that losing electrons is indicated with +, and gaining electrons is indicated with -. ...
... ! We symbolize this ion as Al3+. ! Note that losing electrons is indicated with +, and gaining electrons is indicated with -. ...
chapter 2
... 13. What two things are classified as pure substances?___ compounds _____ and ____ elements ______ 14. What is the difference between a homogeneous and heterogeneous mixture? _____________________ __ HO – looks uniform in composition; HE – you can see different parts ____________ 15. Describe each o ...
... 13. What two things are classified as pure substances?___ compounds _____ and ____ elements ______ 14. What is the difference between a homogeneous and heterogeneous mixture? _____________________ __ HO – looks uniform in composition; HE – you can see different parts ____________ 15. Describe each o ...
Atoms, Ions, and Molecules File
... • The charge of an electron was measured in a famous experiment by Robert Millikan. • The mass of an electron was found to be about 2000 times less than the lightest atom (hydrogen). ...
... • The charge of an electron was measured in a famous experiment by Robert Millikan. • The mass of an electron was found to be about 2000 times less than the lightest atom (hydrogen). ...
atomic number
... Neutral atoms have the same number of protons and electrons. Ions are charged atoms. -cations – have more protons than electrons and are positively charged -anions – have more electrons than protons and are negatively charged ...
... Neutral atoms have the same number of protons and electrons. Ions are charged atoms. -cations – have more protons than electrons and are positively charged -anions – have more electrons than protons and are negatively charged ...
Chapter_5_Notes_Atom - Chemistry
... suggested that electrons travel in circular orbits about the nucleus. The electron possesses a specific energy and is said to occupy energy level. If an electron changes orbit in the Bohr atom, there is a quantum change. Bohr argued that an emission line spectrum results from electrons dropping from ...
... suggested that electrons travel in circular orbits about the nucleus. The electron possesses a specific energy and is said to occupy energy level. If an electron changes orbit in the Bohr atom, there is a quantum change. Bohr argued that an emission line spectrum results from electrons dropping from ...
Historical Development of an Atom - pams
... He proposed that electrons move around the nucleus in specific layers or shells/energy levels Every atom has a specific number of electron shells. Said electrons can jump levels ...
... He proposed that electrons move around the nucleus in specific layers or shells/energy levels Every atom has a specific number of electron shells. Said electrons can jump levels ...
Section 4.2 The Structure of an Atom
... 4. Circle the letter of the expression that accurately compares the masses of neutrons and protons. a. mass of 1 neutron = mass of 1 proton b. mass of 2000 neutrons = mass of 1 proton c. mass of 1 electron = mass of 1 proton Physical Science Reading and Study Workbook Level B ...
... 4. Circle the letter of the expression that accurately compares the masses of neutrons and protons. a. mass of 1 neutron = mass of 1 proton b. mass of 2000 neutrons = mass of 1 proton c. mass of 1 electron = mass of 1 proton Physical Science Reading and Study Workbook Level B ...
AP - 02 - Atoms Molecules and Ions
... chemical facts o When elements are arranged in order of increasing atomic number, their chemical and physical properties show a repeating (periodic) pattern o PERIODS – horizontal rows (7) correspond to the 7 main energy levels of electrons in the atom o GROUPS – vertical columns (18) correspond to ...
... chemical facts o When elements are arranged in order of increasing atomic number, their chemical and physical properties show a repeating (periodic) pattern o PERIODS – horizontal rows (7) correspond to the 7 main energy levels of electrons in the atom o GROUPS – vertical columns (18) correspond to ...
SECTION 3.1 Atomic Structure
... suggested that electrons in an atom move in set paths around the nucleus much like planets orbit the sun. Each electron has a certain path known as the energy level. However, the modern model determined that electrons did not orbit the nucleus in set paths but behaved more like waves on a vibrat ...
... suggested that electrons in an atom move in set paths around the nucleus much like planets orbit the sun. Each electron has a certain path known as the energy level. However, the modern model determined that electrons did not orbit the nucleus in set paths but behaved more like waves on a vibrat ...
Na 2 O - s3.amazonaws.com
... Lise Meitner, (1878 -1968) was an Austrian, physicist who worked on radioactivity and nuclear physics. Meitner was part of the team that discovered nuclear fission (splitting an atom), an achievement for which her colleague Otto Hahn was awarded the Nobel Prize. Meitner is often mentioned as one of ...
... Lise Meitner, (1878 -1968) was an Austrian, physicist who worked on radioactivity and nuclear physics. Meitner was part of the team that discovered nuclear fission (splitting an atom), an achievement for which her colleague Otto Hahn was awarded the Nobel Prize. Meitner is often mentioned as one of ...
Chemistry - Halifax County Public Schools
... 5. Each of the elements in a group or family of the periodic table have what characteristic in common? A B C D ...
... 5. Each of the elements in a group or family of the periodic table have what characteristic in common? A B C D ...
