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Key Concepts - Chemistry Classes of Professor Alba
... Compounds can be divided into two types: molecular compounds, formed between two or more covalently bonded nonmetals; and ionic compounds, usually formed between a metal ionically bonded to one or more nonmetals. The smallest identifiable unit of a molecular compound is a molecule, and the smallest ...
... Compounds can be divided into two types: molecular compounds, formed between two or more covalently bonded nonmetals; and ionic compounds, usually formed between a metal ionically bonded to one or more nonmetals. The smallest identifiable unit of a molecular compound is a molecule, and the smallest ...
Models of the Atom
... “nucleus” contained all of the positive charge and essentially all the mass of the atom • Rutherford explained the nature of the atom but not the mass. In 1931 James Chadwick discovered the neutron which explained the mass • Bohr hypothesized that hydrogen only had certain allowable energy levels on ...
... “nucleus” contained all of the positive charge and essentially all the mass of the atom • Rutherford explained the nature of the atom but not the mass. In 1931 James Chadwick discovered the neutron which explained the mass • Bohr hypothesized that hydrogen only had certain allowable energy levels on ...
atomic number
... number of protons (atomic number) – The number of neutrons in an atom can vary • a family of elements with atoms having the same chemical properties but slightly different masses. • These atoms with differing masses are called isotopes ...
... number of protons (atomic number) – The number of neutrons in an atom can vary • a family of elements with atoms having the same chemical properties but slightly different masses. • These atoms with differing masses are called isotopes ...
Chapter 2 - U of L Class Index
... The # protons defines the element. If the # protons changes, then it is not the same element. eg. The carbon atom has 6 protons in the nucleus. If you remove 1 proton from the carbon nucleus, you change the nature of the element. C - p → B if you add 1 proton to the carbon nucleus you get nitrogen. ...
... The # protons defines the element. If the # protons changes, then it is not the same element. eg. The carbon atom has 6 protons in the nucleus. If you remove 1 proton from the carbon nucleus, you change the nature of the element. C - p → B if you add 1 proton to the carbon nucleus you get nitrogen. ...
Atomic Structure Video Guide
... 11. _________________ is the element that makes up graphite in a pencil. 12. If Carbon has 6 electrons then it has 6 _________________________. 13. Atomic Mass is the number of _______________________ and _____________________ in an atom. 14. Silicon (Si) is a major element that makes up ___________ ...
... 11. _________________ is the element that makes up graphite in a pencil. 12. If Carbon has 6 electrons then it has 6 _________________________. 13. Atomic Mass is the number of _______________________ and _____________________ in an atom. 14. Silicon (Si) is a major element that makes up ___________ ...
introductory chemistry
... Elements are substances that contain only one type of atom. Hydrogen gas is an element as it contains only hydrogen atoms. Compounds contain the atoms of two or more different elements joined together. Water is a compound that consists of hydrogen and oxygen atoms joined together. There are nearly 1 ...
... Elements are substances that contain only one type of atom. Hydrogen gas is an element as it contains only hydrogen atoms. Compounds contain the atoms of two or more different elements joined together. Water is a compound that consists of hydrogen and oxygen atoms joined together. There are nearly 1 ...
Part A: Multiple Choice. Circle the letter
... 7. In general, which of the following properties does NOT increase across a row from left to right? a) atomic number b) atomic radius c) nuclear charge d) ionization energy e) electron affinity 8. Which of the following properties decreases from top to bottom in a column? a) ionization energy b) ato ...
... 7. In general, which of the following properties does NOT increase across a row from left to right? a) atomic number b) atomic radius c) nuclear charge d) ionization energy e) electron affinity 8. Which of the following properties decreases from top to bottom in a column? a) ionization energy b) ato ...
2/1: Atomic Structure
... – 99.9% of the atom’s mass is here – about 100,000 times smaller than the entire atom – the atomic number of an atom is the number of protons in the nucleus – the atomic mass or mass number of an atom is the sum of the protons and neutrons ...
... – 99.9% of the atom’s mass is here – about 100,000 times smaller than the entire atom – the atomic number of an atom is the number of protons in the nucleus – the atomic mass or mass number of an atom is the sum of the protons and neutrons ...
2008 Midterm Multiple Choice
... Xe(l ), Kr(l), Ar(l), Ne(l ) Kr(l), Xe(l), Ar(l), Ne(l) Ar(l), Kr(l), Ne(l), Xe(l) Ne(l), Ar(l), Kr(l), Xe(l ) ...
... Xe(l ), Kr(l), Ar(l), Ne(l ) Kr(l), Xe(l), Ar(l), Ne(l) Ar(l), Kr(l), Ne(l), Xe(l) Ne(l), Ar(l), Kr(l), Xe(l ) ...
AP Chemistry
... 2.1.4.1 Each element is made of extremely small particles (atoms). 2.1.4.2 All atoms of a given element are identical to one another in mass and other properties, but the atoms of one element are different from the atoms of other elements. 2.1.4.3 Atoms of an element are not changed into atoms of a ...
... 2.1.4.1 Each element is made of extremely small particles (atoms). 2.1.4.2 All atoms of a given element are identical to one another in mass and other properties, but the atoms of one element are different from the atoms of other elements. 2.1.4.3 Atoms of an element are not changed into atoms of a ...
Atoms and the Periodic Table
... Valence electrons◦ Electron(s) that are found in the outermost shell of an atom. ◦ Valence electrons determine the atom’s chemical properties and its ability to form bonds. ...
... Valence electrons◦ Electron(s) that are found in the outermost shell of an atom. ◦ Valence electrons determine the atom’s chemical properties and its ability to form bonds. ...
Atomic structure unit powerpoint
... elements with similar properties were vertically aligned with each other. In making such alignments Mendeleev was able to determine that several, as yet unidentified, elements should exist (the elements with masses 44, 68 and 72 are examples). He went on to make predictions about the properties of t ...
... elements with similar properties were vertically aligned with each other. In making such alignments Mendeleev was able to determine that several, as yet unidentified, elements should exist (the elements with masses 44, 68 and 72 are examples). He went on to make predictions about the properties of t ...
Magic Square and isotope worksheet
... 3. Used by Rutherford in his experiment; made of two protons and two neutrons 4. The paths in which electrons circle the nucleus according to the Bohr model 5. The positive particle in the nucleus of an atom 6. The tiny positive core of an atom; contains protons and neutrons 7. Formed the atomic the ...
... 3. Used by Rutherford in his experiment; made of two protons and two neutrons 4. The paths in which electrons circle the nucleus according to the Bohr model 5. The positive particle in the nucleus of an atom 6. The tiny positive core of an atom; contains protons and neutrons 7. Formed the atomic the ...
Deconstructed HS-PS1-2
... to chemical reactions involving main group elements and combustion reactions.] ...
... to chemical reactions involving main group elements and combustion reactions.] ...
Notetaking Workshee
... arranged by increasing atomic number and by changes in physical and chemical properties. 3. In 1913, the work of Henry G.J. ___________________, an English scientist made an arrangement of elements based on their increasing _________________________________________ instead of masses. 4. The current ...
... arranged by increasing atomic number and by changes in physical and chemical properties. 3. In 1913, the work of Henry G.J. ___________________, an English scientist made an arrangement of elements based on their increasing _________________________________________ instead of masses. 4. The current ...
File
... • 1st Periodic Table created in 1869. • Periodic table: an arrangement of elements showing the repeating pattern of their properties. • As new elements discovered, periodic table changed. • Number of protons in nucleus (atomic number), determines the chemical properties of an element. • Modern perio ...
... • 1st Periodic Table created in 1869. • Periodic table: an arrangement of elements showing the repeating pattern of their properties. • As new elements discovered, periodic table changed. • Number of protons in nucleus (atomic number), determines the chemical properties of an element. • Modern perio ...
Review Questions 1. How many protons does potassium have? 2
... b. Nuclear forces equalize the charges c. The number of protons and electrons is equal d. The number of protons and neutrons is equal 31. The most common form of hydrogen has a. No neutrons b. 1 neutron c. 2 neutrons d. 3 neutrons 32. The name of the scientist who showed the existence of the nucleus ...
... b. Nuclear forces equalize the charges c. The number of protons and electrons is equal d. The number of protons and neutrons is equal 31. The most common form of hydrogen has a. No neutrons b. 1 neutron c. 2 neutrons d. 3 neutrons 32. The name of the scientist who showed the existence of the nucleus ...
File - Norris Science
... the tiny alpha particles would pass through the gold atoms and fly straight into the screen. ...
... the tiny alpha particles would pass through the gold atoms and fly straight into the screen. ...
- St. Aidan School
... atoms that cannot be divided ii. All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses. iii. An atom of one element cannot be changed into an atom of a different element. They can not be created of destroyed in any ...
... atoms that cannot be divided ii. All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses. iii. An atom of one element cannot be changed into an atom of a different element. They can not be created of destroyed in any ...
The Chemical Context of Life
... and protons have a mass of 1 dalton (same as atomic mass unit) Atomic number – number of protons ...
... and protons have a mass of 1 dalton (same as atomic mass unit) Atomic number – number of protons ...
Atomic Structure - Peoria Public Schools
... Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...
... Ernest Rutherford: Existence of the nucleus, and its relative size Meitner & Fermi: Sustained nuclear fission Ernest Lawrence: The cyclotron and trans-uranium elements ...