Topic 1 – Atomic structure and the periodic table
... o Mendeleev arranged the elements in order of increasing atomic mass (i.e in order of increasing numbers of protons and neutrons – see below) o Mendeleev organised elements with similar properties into vertical columns (called ‘groups’) Unlike other chemists before him, Mendeleev: o sometimes broke ...
... o Mendeleev arranged the elements in order of increasing atomic mass (i.e in order of increasing numbers of protons and neutrons – see below) o Mendeleev organised elements with similar properties into vertical columns (called ‘groups’) Unlike other chemists before him, Mendeleev: o sometimes broke ...
Atomic Mass - Coach ONeal
... • The mass of a proton is about the same as that of a neutron. And the mass of each is about 1,800 times greater than the mass of the electron. • The unit of measurement used for atomic particles is the atomic mass unit (amu). • The mass of a proton or a neutron is almost equal to 1 amu. ...
... • The mass of a proton is about the same as that of a neutron. And the mass of each is about 1,800 times greater than the mass of the electron. • The unit of measurement used for atomic particles is the atomic mass unit (amu). • The mass of a proton or a neutron is almost equal to 1 amu. ...
Atomic structure
... Atomic Number – This is equal to the number of protons in an atom. All atoms of each element always have atoms with the same number of protons. Mass number – The sum of the number of protons and neutrons in a nucleus for a particular atom. Isotopes - Many elements have atoms with different atomic ma ...
... Atomic Number – This is equal to the number of protons in an atom. All atoms of each element always have atoms with the same number of protons. Mass number – The sum of the number of protons and neutrons in a nucleus for a particular atom. Isotopes - Many elements have atoms with different atomic ma ...
Atomic Structure
... a. Since most alpha particles are deflected from the foil. b. Since most of the alpha particles passed the foil undeflected. c. Since it was earlier proposed by J.J.Thompson. d. Since atoms are meant to be empty. 12. What is the difference between J.J.Thompson's and Rutherford’s theories with respec ...
... a. Since most alpha particles are deflected from the foil. b. Since most of the alpha particles passed the foil undeflected. c. Since it was earlier proposed by J.J.Thompson. d. Since atoms are meant to be empty. 12. What is the difference between J.J.Thompson's and Rutherford’s theories with respec ...
The Periodic Table of Elements and Atoms…
... •Neutrons, also found in the nucleus, have no electrical charge. They are neutral. They have about the same mass as a proton. •The nucleus is the central core of an atom that contains most of the mass of an atom because it contains both the neutrons and protons. ...
... •Neutrons, also found in the nucleus, have no electrical charge. They are neutral. They have about the same mass as a proton. •The nucleus is the central core of an atom that contains most of the mass of an atom because it contains both the neutrons and protons. ...
Atomic Theory Development
... This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in different energy levels. A model uses familiar ideas to explain unfamiliar facts Observed in nature. ...
... This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in different energy levels. A model uses familiar ideas to explain unfamiliar facts Observed in nature. ...
history of the atom from democritus to bohr and
... could move only in fixed orbits of specific energies. Electrons with low energy would orbit closer to the nucleus while electrons with high energy orbit further from the nucleus. In 1932, James Chadwick identified the neutron. The particle proposed by Rutherford as having significant mass and no cha ...
... could move only in fixed orbits of specific energies. Electrons with low energy would orbit closer to the nucleus while electrons with high energy orbit further from the nucleus. In 1932, James Chadwick identified the neutron. The particle proposed by Rutherford as having significant mass and no cha ...
Atomic Structure
... (From ‘atmos’ meaning invisible) *Eventually after many years Democritus is proven right ...
... (From ‘atmos’ meaning invisible) *Eventually after many years Democritus is proven right ...
day4-periodictrends
... Set C: Y, Ti, Sg, Ta 4. Rank the following sets of elements in order of decreasing electronegativity (big small). Set A: Cl, At, I, F, Br Set B: Te, Xe, Sn, In Set C: Rb, K, Sr, Ca ...
... Set C: Y, Ti, Sg, Ta 4. Rank the following sets of elements in order of decreasing electronegativity (big small). Set A: Cl, At, I, F, Br Set B: Te, Xe, Sn, In Set C: Rb, K, Sr, Ca ...
chapter 6 - TAMU Chemistry
... f - transition metals Sometimes called inner transition metals. Electrons are being added to f orbitals. Very slight variations of properties from one element to another. ...
... f - transition metals Sometimes called inner transition metals. Electrons are being added to f orbitals. Very slight variations of properties from one element to another. ...
Study Island Copyright © 2012 Study Island
... 15. Which of the following is true about a compound and its elements? A. The properties of a compound are the same as the properties of its elements. B. The elements all share identical properties, but their properties are different than the compound's properties. C. The properties of a compound are ...
... 15. Which of the following is true about a compound and its elements? A. The properties of a compound are the same as the properties of its elements. B. The elements all share identical properties, but their properties are different than the compound's properties. C. The properties of a compound are ...
Atomic Theory Jigsaw
... You may use the information provided by the Atomic Timeline or any other electronic and print sources (your textbook is an excellent resource). You will be allowed this week and the use of the laptop computers (assuming that you have turned in your Internet permission form) to complete the work. You ...
... You may use the information provided by the Atomic Timeline or any other electronic and print sources (your textbook is an excellent resource). You will be allowed this week and the use of the laptop computers (assuming that you have turned in your Internet permission form) to complete the work. You ...
CHAPTER 6
... f - transition metals Sometimes called inner transition metals. Electrons are being added to f orbitals. Very slight variations of properties from one element to another. ...
... f - transition metals Sometimes called inner transition metals. Electrons are being added to f orbitals. Very slight variations of properties from one element to another. ...
Inside the Atom
... repel each other Rather strong nuclear forces hold the protons together only when they are closely packed as they are in the nucleus of the atom ...
... repel each other Rather strong nuclear forces hold the protons together only when they are closely packed as they are in the nucleus of the atom ...
Chapter 8
... Binary ionic compounds are composed of positively charged monatomic ions of a metal and negatively charged monatomic ions of a nonmetal. – A monatomic ion is a one-atom ion. Charge depends on its place on the periodic table. Look at periodic table for Oxidation Numbers or for ...
... Binary ionic compounds are composed of positively charged monatomic ions of a metal and negatively charged monatomic ions of a nonmetal. – A monatomic ion is a one-atom ion. Charge depends on its place on the periodic table. Look at periodic table for Oxidation Numbers or for ...
Document
... element. Decimal number. Mass Number – the total number of protons and neutrons in the nucleus of an atom. Whole number. ...
... element. Decimal number. Mass Number – the total number of protons and neutrons in the nucleus of an atom. Whole number. ...
Overall Score: _____ / 22 (each question is worth
... Metals are more dense than nonmetals. The particles in a metal are more tightly packed together than nonmetals (remember that metals are solid at room temperature, while nonmetals are gas at room temperature). Therefore, the ratio of mass to volume (density) is greater in metals than in nonmetals. M ...
... Metals are more dense than nonmetals. The particles in a metal are more tightly packed together than nonmetals (remember that metals are solid at room temperature, while nonmetals are gas at room temperature). Therefore, the ratio of mass to volume (density) is greater in metals than in nonmetals. M ...
Atomic Theory Notes (Chap 3,18
... the nucleus at great speeds in energy levels, sublevels, and orbitals. Atoms can contain as many as 7 energy levels. B. The greater the distance from the nucleus, the higher the energy level of the ...
... the nucleus at great speeds in energy levels, sublevels, and orbitals. Atoms can contain as many as 7 energy levels. B. The greater the distance from the nucleus, the higher the energy level of the ...
Chapter 5: Electrons
... State the trends in atomic radius, ionization energy, electron affinity and ion size with a group or period on the periodic table. Identify the relationship between these trends and the structure of the atom. ...
... State the trends in atomic radius, ionization energy, electron affinity and ion size with a group or period on the periodic table. Identify the relationship between these trends and the structure of the atom. ...
The number of neutrons in the nucleus of a specific atom is equal to its
... The first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom was ...
... The first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom was ...
Atomic Math
... protons in an atom. – The atomic mass only measures the nucleus. – Unreacted atoms should be neutral, meaning they should have the same number of protons and electrons. ...
... protons in an atom. – The atomic mass only measures the nucleus. – Unreacted atoms should be neutral, meaning they should have the same number of protons and electrons. ...