Periodic Trends
... being held more tightly and closely by the nucleus. You have to fight to get one free. • Ionization energy gets weaker as you move down a column on the periodic table. • As you go down a column, you add another orbit so the negative electrons are further away from the positive protons and the attrac ...
... being held more tightly and closely by the nucleus. You have to fight to get one free. • Ionization energy gets weaker as you move down a column on the periodic table. • As you go down a column, you add another orbit so the negative electrons are further away from the positive protons and the attrac ...
Atoms and isotopes MS
... Correct formulas [1], balancing of correct equation [1]. 2Na + 2T2O 2NaOT + T2; Correct formulas [1], balancing of correct equation [1]. If H is used instead of T in any of the equations [3 max]. Accept any other suitable equation for both parts. ...
... Correct formulas [1], balancing of correct equation [1]. 2Na + 2T2O 2NaOT + T2; Correct formulas [1], balancing of correct equation [1]. If H is used instead of T in any of the equations [3 max]. Accept any other suitable equation for both parts. ...
File
... Some Hydrogen atoms have one neutron as well as the one proton and electron. This is a different isotope - it is still hydrogen, but it has a mass of 2 a.m.u. This isotope is called Hydrogen-2 Also called Deuterium ...
... Some Hydrogen atoms have one neutron as well as the one proton and electron. This is a different isotope - it is still hydrogen, but it has a mass of 2 a.m.u. This isotope is called Hydrogen-2 Also called Deuterium ...
Ch2 Lecture
... A. Relating Valence Electrons to Group Number •Elements in the same group have similar electron configurations. •Elements in the same group have the same number of valence electrons. ...
... A. Relating Valence Electrons to Group Number •Elements in the same group have similar electron configurations. •Elements in the same group have the same number of valence electrons. ...
File - 8th Grade Physical Science
... In ancient times, many elements were known, including C, S, Cu, Ag, Au, Fe, Sn, Sb and Pb. The names of most of these are from the Latin words. ...
... In ancient times, many elements were known, including C, S, Cu, Ag, Au, Fe, Sn, Sb and Pb. The names of most of these are from the Latin words. ...
MIDTERM EXAM – JANUARY, 2003
... 73. Describe how ionization energy changes as you move across the periodic table. 74. Describe how electronegativity changes as you move across the periodic table. 75. The transition metals occupy the ______________ block of the periodic table 76. The alkali metals and alkaline earth metals occupy t ...
... 73. Describe how ionization energy changes as you move across the periodic table. 74. Describe how electronegativity changes as you move across the periodic table. 75. The transition metals occupy the ______________ block of the periodic table 76. The alkali metals and alkaline earth metals occupy t ...
Chapter 6 Review
... that are characterized by the filling of p orbitals are classified as _____. As you move from left to right across the second period of the periodic table, ionization energy __. Atomic size generally decreases as you ____. ...
... that are characterized by the filling of p orbitals are classified as _____. As you move from left to right across the second period of the periodic table, ionization energy __. Atomic size generally decreases as you ____. ...
Intro to Chapter 5 Development of the Periodic Table
... observations followed by organization of data into trends resulted in a consistent hypothesis which could explain known facts and makes correct predictions of the elements. B. Mendeleev s organized chemical information by: 1) listing elements by atomic weight 2) grouping them together according to c ...
... observations followed by organization of data into trends resulted in a consistent hypothesis which could explain known facts and makes correct predictions of the elements. B. Mendeleev s organized chemical information by: 1) listing elements by atomic weight 2) grouping them together according to c ...
Ionization energy
... (Noble gases) they could not be accommodated in his table. However, the modern periodic table does draw from the concept of periods of eight. ...
... (Noble gases) they could not be accommodated in his table. However, the modern periodic table does draw from the concept of periods of eight. ...
Atomic Structure, Bonding and Periodicity
... Bond Polarity and the Polarisation of Ions • In reality not all bonds are perfectly covalent or ionic. To explain why we have to define a concept called electronegativity. • Electronegativity is the ability of an atom to attract the bonding electrons. • In hydrogen fluoride the fluorine atoms are m ...
... Bond Polarity and the Polarisation of Ions • In reality not all bonds are perfectly covalent or ionic. To explain why we have to define a concept called electronegativity. • Electronegativity is the ability of an atom to attract the bonding electrons. • In hydrogen fluoride the fluorine atoms are m ...
Chapter 5 The Periodic Law
... a. Without looking at the periodic table, identify the group, period, and block in which the element that has the electron configuration [Xe]6s2 is located. b. Without looking at the periodic table, write the electron configuration for the Group 1 element in the third period. Is this element likely ...
... a. Without looking at the periodic table, identify the group, period, and block in which the element that has the electron configuration [Xe]6s2 is located. b. Without looking at the periodic table, write the electron configuration for the Group 1 element in the third period. Is this element likely ...
File - 8th Grade Physical Science
... Niels Bohr (who worked with Rutherford) suggested that electrons travel around the nucleus in definite paths ...
... Niels Bohr (who worked with Rutherford) suggested that electrons travel around the nucleus in definite paths ...
O 2 (g)
... • Consider the three metals Li, Na, and K – All 3 metals are soft – All 3 metals are less dense than water – All 3 metals have similar appearance and low melting points – The most interesting feature is that all 3 metals react with the same elements in a nearly identical manner • As you see in the p ...
... • Consider the three metals Li, Na, and K – All 3 metals are soft – All 3 metals are less dense than water – All 3 metals have similar appearance and low melting points – The most interesting feature is that all 3 metals react with the same elements in a nearly identical manner • As you see in the p ...
Unit V: Atomic Theory Vocabulary: atoms, ions, compounds
... Isotopes: atoms of the same element with different mass numbers. On the periodic table, the relative atomic masses (a.k.a. molar mass) are often given as decimal (e.g. chlorine is 35.45) because that number is an average relative atomic mass for all of the naturally occurring isotopes. Scientists ca ...
... Isotopes: atoms of the same element with different mass numbers. On the periodic table, the relative atomic masses (a.k.a. molar mass) are often given as decimal (e.g. chlorine is 35.45) because that number is an average relative atomic mass for all of the naturally occurring isotopes. Scientists ca ...
Inside an Atom - Mrs. Ericka Williams
... They are identified by the number or protons because this number never changes without changing the identity of the element Are atoms of the same element that have different numbers of neutrons; for example, the three isotopes of carbon differ in the number of neutrons in each nucleus such as Carbon ...
... They are identified by the number or protons because this number never changes without changing the identity of the element Are atoms of the same element that have different numbers of neutrons; for example, the three isotopes of carbon differ in the number of neutrons in each nucleus such as Carbon ...
Atomic History - Wylie High School Advanced Chemistry
... example, chlorine has two isotopes with mass numbers 35 and 37. Dalton also claimed that atoms of different elements are different in all respects. This has been proven wrong in certain cases: argon and calcium atoms each have an atomic mass of 40 amu. These atoms are ...
... example, chlorine has two isotopes with mass numbers 35 and 37. Dalton also claimed that atoms of different elements are different in all respects. This has been proven wrong in certain cases: argon and calcium atoms each have an atomic mass of 40 amu. These atoms are ...
Atoms, Molecules and Ions History
... • Rutherford suggested that the atom was mostly empty space with a highly charged center. Most of the particles pass through the atom undisturbed, but a few get too close to the center and are deflected. ...
... • Rutherford suggested that the atom was mostly empty space with a highly charged center. Most of the particles pass through the atom undisturbed, but a few get too close to the center and are deflected. ...
atomic number
... identical. Atoms of any one element are different from those of any other element. ...
... identical. Atoms of any one element are different from those of any other element. ...
Chemistry: The Periodic Table and Periodicity
... Why does each successive ionization require more energy than the previous one? The nuclear charge remains the same, but you are losing an electron; therefore, the nucleus has a stronger hold on the fewer remaining electrons in the outer shell. ...
... Why does each successive ionization require more energy than the previous one? The nuclear charge remains the same, but you are losing an electron; therefore, the nucleus has a stronger hold on the fewer remaining electrons in the outer shell. ...
Chapter TWO
... Elements are arranged in an increasing order according to their atomic numbers , where each element has one electron more than the element before it . This is based on Aufbau principle . ...
... Elements are arranged in an increasing order according to their atomic numbers , where each element has one electron more than the element before it . This is based on Aufbau principle . ...
John Dalton Dmitri Mendeleev JJ Thomson Ernest Rutherford
... Activity 2: What the scientists did. Cut each of the scientist rectangles on the 2nd sheet of paper Spread them out across your work table. These are going to be your headings. Next, cut each of the “things they did” descriptions. You are going to research each description and determine ...
... Activity 2: What the scientists did. Cut each of the scientist rectangles on the 2nd sheet of paper Spread them out across your work table. These are going to be your headings. Next, cut each of the “things they did” descriptions. You are going to research each description and determine ...
Activity - Periodic Table Scavenger Hunt
... Use the periodic table of elements and your text book to explore and learn to use the periodic table. To answer each of the questions below, draw the atomic number, chemical symbol and element name in the boxes provided. ...
... Use the periodic table of elements and your text book to explore and learn to use the periodic table. To answer each of the questions below, draw the atomic number, chemical symbol and element name in the boxes provided. ...
Key Concepts
... 15. The Bohr Model of the atom placed electrons in “planet-like” orbits around the nucleus of an atom. 16. The current, wave-mechanical model of the atom has electrons in “clouds” (orbitals) around the nucleus. 17. Electrons emit energy as light when they jump from higher energy levels back down to ...
... 15. The Bohr Model of the atom placed electrons in “planet-like” orbits around the nucleus of an atom. 16. The current, wave-mechanical model of the atom has electrons in “clouds” (orbitals) around the nucleus. 17. Electrons emit energy as light when they jump from higher energy levels back down to ...