Unit 4 Test REVIEW
... 29. ___________________ gold-foil experiment demonstrated that most of the atom is empty space. 30. Atomic mass is a relative scale based on which nuclide? 31. What is the mass number of an atom that has 20 protons, 22 neutrons and 20 electrons? 32. The word atom comes from the Greek word atomos mea ...
... 29. ___________________ gold-foil experiment demonstrated that most of the atom is empty space. 30. Atomic mass is a relative scale based on which nuclide? 31. What is the mass number of an atom that has 20 protons, 22 neutrons and 20 electrons? 32. The word atom comes from the Greek word atomos mea ...
I. Short Answer and Fill in the Blanks
... of Multiple Proportions using an atomic theory. His theory proposed that atoms: a. are the building blocks of matter b. are indivisible c. of the same element are identical d. of different elements are different e. unite in small, whole-number ratios to form compounds Rutherford The discovery of the ...
... of Multiple Proportions using an atomic theory. His theory proposed that atoms: a. are the building blocks of matter b. are indivisible c. of the same element are identical d. of different elements are different e. unite in small, whole-number ratios to form compounds Rutherford The discovery of the ...
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... _________________ that they cannot know exactly where an _______________________ is or what _________________________ it has. - To continue using ______________________________ to calculate _________________________ based on their _________________________ of the atom, scientists have come up with a ...
... _________________ that they cannot know exactly where an _______________________ is or what _________________________ it has. - To continue using ______________________________ to calculate _________________________ based on their _________________________ of the atom, scientists have come up with a ...
11 what are elements made of
... When scientists make new elements they make new kinds of atoms. It is difficult to imagine anything as small as an atom. 100 million of them side by side will only measure about 1cm3. A single atom is so small that it cannot be weighed on a balance. There has to be a special scale to measure the mas ...
... When scientists make new elements they make new kinds of atoms. It is difficult to imagine anything as small as an atom. 100 million of them side by side will only measure about 1cm3. A single atom is so small that it cannot be weighed on a balance. There has to be a special scale to measure the mas ...
Atomic History Timeline
... • Thought that all things were made of tiny, invisible, indestructible particles, called atoms • Thought atoms varied in size, shape and ...
... • Thought that all things were made of tiny, invisible, indestructible particles, called atoms • Thought atoms varied in size, shape and ...
Chapter 2 Matter is Made up of Atoms
... If an electrical field was applied to the cathode ray tube below. Which direction (up or down) would the beam of light be bent ? ...
... If an electrical field was applied to the cathode ray tube below. Which direction (up or down) would the beam of light be bent ? ...
File
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
Atomic Theories Timeline
... 460 – 370 B.C. • There are various basic elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
... 460 – 370 B.C. • There are various basic elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
Electrons
... bigger than electrons. The part of an atom that gives an element its identity. • Neutrons (neutral) are slightly bigger in mass than a proton. • Electrons (negative) charge, have a mass of ...
... bigger than electrons. The part of an atom that gives an element its identity. • Neutrons (neutral) are slightly bigger in mass than a proton. • Electrons (negative) charge, have a mass of ...
UNIT 5 - ATOMIC THEORY: THE NUCLEAR MODEL OF THE ATOM
... B) If the electron orbits the nucleus, it will have to change direction a lot. A change in direction means acceleration, which involves the use of energy. If this is so, the electron will again spiral into the nucleus. Neils Bohr (1885 - 1962) Bohr was a Danish physicist ($16,000 Millionaire questio ...
... B) If the electron orbits the nucleus, it will have to change direction a lot. A change in direction means acceleration, which involves the use of energy. If this is so, the electron will again spiral into the nucleus. Neils Bohr (1885 - 1962) Bohr was a Danish physicist ($16,000 Millionaire questio ...
The Atom - VCE Chemistry
... • All matter is made up of atoms as Dalton suggested, but it can be subdivided into protons, neutrons and electrons. • Atoms of the same element are not identical. • Each atom of the same element has the same number of protons, but not necessarily the same number of neutrons. • Dalton was unaware of ...
... • All matter is made up of atoms as Dalton suggested, but it can be subdivided into protons, neutrons and electrons. • Atoms of the same element are not identical. • Each atom of the same element has the same number of protons, but not necessarily the same number of neutrons. • Dalton was unaware of ...
Electron Configuration and Periodic Properties
... • An ion is an atom or group of bonded atoms that has a positive or negative charge. • Sodium (Na), for example, easily loses an electron to form Na+. • Any process that results in the formation of an ion is referred to as ionization. • The energy required to remove one electron from a neutral atom ...
... • An ion is an atom or group of bonded atoms that has a positive or negative charge. • Sodium (Na), for example, easily loses an electron to form Na+. • Any process that results in the formation of an ion is referred to as ionization. • The energy required to remove one electron from a neutral atom ...
- MrKowalik.com
... • You can’t just shove all of the electrons into the first orbit of an electron. • Electrons live in something called shells or energy levels. • Only so many electrons can be in any certain shell. • The outer most shell is called the valance shell. • The electrons in the outer most shell of any elem ...
... • You can’t just shove all of the electrons into the first orbit of an electron. • Electrons live in something called shells or energy levels. • Only so many electrons can be in any certain shell. • The outer most shell is called the valance shell. • The electrons in the outer most shell of any elem ...
Atomic Structure
... must give off the exact amount of energy it picked up from the outside source When it returns to its ground state, it emits or gives off the energy in the form of light and heat The light emitted by excited electrons in atoms is not a continuous spectrum (all the colors) but a line spectrum (onl ...
... must give off the exact amount of energy it picked up from the outside source When it returns to its ground state, it emits or gives off the energy in the form of light and heat The light emitted by excited electrons in atoms is not a continuous spectrum (all the colors) but a line spectrum (onl ...
Chemistry 11 Early Models of the Atom Power Point
... the electron could “inhabit”. In it’s ground state, the electron would be in the lowest level (n=1) When the atom was “excited” the electron could “jump” to a higher level. When the electron came back down, it released energy in the form of light. ...
... the electron could “inhabit”. In it’s ground state, the electron would be in the lowest level (n=1) When the atom was “excited” the electron could “jump” to a higher level. When the electron came back down, it released energy in the form of light. ...
atomic structure revision and questions 08
... ATOMIC STRUCTURE REVISION AND QUESTIONS 2015 Key words: element nucleus molecule neutron atom proton mass number ...
... ATOMIC STRUCTURE REVISION AND QUESTIONS 2015 Key words: element nucleus molecule neutron atom proton mass number ...
1 - College of Arts and Sciences
... 1 mole of 12C atoms has a mass of exactly 12 grams. 6 protons x 1.66 x 10-24 grams = 9.96 x 10-24 6 neutrons x 1.66 x 10-24 grams = 9.96 x 10-24 So 12 C weighs 19.92 x 10 -24 grams ...
... 1 mole of 12C atoms has a mass of exactly 12 grams. 6 protons x 1.66 x 10-24 grams = 9.96 x 10-24 6 neutrons x 1.66 x 10-24 grams = 9.96 x 10-24 So 12 C weighs 19.92 x 10 -24 grams ...