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1st mid unit test formative (pre-test)
... Metals are separated from non-metals by a staircase of elements called Metallica. Atomic number is the number of protons in an atom of an element. Atomic mass is the number of protons in an atom of an element. An ion is an atom or group of atoms with a negative charge or a positive charge. Noble gas ...
... Metals are separated from non-metals by a staircase of elements called Metallica. Atomic number is the number of protons in an atom of an element. Atomic mass is the number of protons in an atom of an element. An ion is an atom or group of atoms with a negative charge or a positive charge. Noble gas ...
Revision topic 1-3
... Positive ions are smaller than their parent atoms (because of loss of the outer shell). Negative ions are larger than their parent atoms (because of increased electron repulsion by addition of electrons). The ionic radii decrease as a period is crossed from the left to the right (because of increase ...
... Positive ions are smaller than their parent atoms (because of loss of the outer shell). Negative ions are larger than their parent atoms (because of increased electron repulsion by addition of electrons). The ionic radii decrease as a period is crossed from the left to the right (because of increase ...
Advances in Atomic Theory
... Atoms of a particular element must always have the same number of ___________ but the number of _____________ may vary. Isotopes - Atoms of the ________ element that have different numbers of __________________. Isotopes can be written two ways: 1. The name of the element followed by the mass numbe ...
... Atoms of a particular element must always have the same number of ___________ but the number of _____________ may vary. Isotopes - Atoms of the ________ element that have different numbers of __________________. Isotopes can be written two ways: 1. The name of the element followed by the mass numbe ...
Chapter 2 Law of Conservation of Mass Law of Conservation of Mass
... • Some groups have descriptive names that are commonly used instead of their group numbers. – Halogens (Halides) • Group 17 (VIIA) nonmetals • exist naturally as diatomic molecules – Noble gases • Group 18 (VIIIA) nonmetals • are also called inert gases • are so named because they do not chemically ...
... • Some groups have descriptive names that are commonly used instead of their group numbers. – Halogens (Halides) • Group 17 (VIIA) nonmetals • exist naturally as diatomic molecules – Noble gases • Group 18 (VIIIA) nonmetals • are also called inert gases • are so named because they do not chemically ...
Structure of the Atom - Saint Mary Catholic School
... The proton seems so happy with the neutron. I’m having fun, but I still notice the electron. It won’t bother me if the electron hangs around. ...
... The proton seems so happy with the neutron. I’m having fun, but I still notice the electron. It won’t bother me if the electron hangs around. ...
Document
... The proton seems so happy with the neutron. I’m having fun, but I still notice the electron. It won’t bother me if the electron hangs around. ...
... The proton seems so happy with the neutron. I’m having fun, but I still notice the electron. It won’t bother me if the electron hangs around. ...
Interesting and Helpful Websites Early Models of the Atom
... atoms Atoms of the same element are identical. Atoms of different elements mix. Atoms of different elements chemically combine in simple whole number ratios. Chemical reactions occur when atoms are separated from or joined to other atoms. – Atoms contain particles that have electric charge. ...
... atoms Atoms of the same element are identical. Atoms of different elements mix. Atoms of different elements chemically combine in simple whole number ratios. Chemical reactions occur when atoms are separated from or joined to other atoms. – Atoms contain particles that have electric charge. ...
Atoms and Elements ppt - Mrs. Hoenshell Science 2016
... Objective: “I will be able to identify the parts of an atom and learn the symbols and the electrons, protons and neutrons for the first 20 elements in the periodic table.” Classwork: Intro to the Periodic Table Essential Questions: How does the structure of matter and the properties of elements a ...
... Objective: “I will be able to identify the parts of an atom and learn the symbols and the electrons, protons and neutrons for the first 20 elements in the periodic table.” Classwork: Intro to the Periodic Table Essential Questions: How does the structure of matter and the properties of elements a ...
Chapter 4 Atomic Structure
... protons and 140 neutrons what is the a) Atomic number b) Mass number c) number of electrons ...
... protons and 140 neutrons what is the a) Atomic number b) Mass number c) number of electrons ...
CP Chemistry Final Exam Review Sheet
... 50. What is the octet rule? The octet rule states that atoms will gain, lose, or share electrons in order to get a full octet (8 e-) in the valence (outermost) shell of an atom. 51. An ion is a particle with an electrical charge created by the transfer (loss or gaining) of electrons. 52. What is a c ...
... 50. What is the octet rule? The octet rule states that atoms will gain, lose, or share electrons in order to get a full octet (8 e-) in the valence (outermost) shell of an atom. 51. An ion is a particle with an electrical charge created by the transfer (loss or gaining) of electrons. 52. What is a c ...
electron configurations of elements(ground state)
... When given an atom in chemistry, we often want to know how the electrons are arranged in that atom. The arrangement is called the electron configuration of that atom. The electrons fall into orbits which are different distances from the nucleus of the atom. These orbits can be looked upon like orbit ...
... When given an atom in chemistry, we often want to know how the electrons are arranged in that atom. The arrangement is called the electron configuration of that atom. The electrons fall into orbits which are different distances from the nucleus of the atom. These orbits can be looked upon like orbit ...
e - Central Lyon CSD
... A. Def – the # of protons in an atom’s nucleus. 1. Every carbon atom has 6 protons… 2. Every neon atom has 10 protons… B. On P.T. – located right above the chemical symbol *Protons dictate the type of element we have* *Electrons always equal the # of protons* ...
... A. Def – the # of protons in an atom’s nucleus. 1. Every carbon atom has 6 protons… 2. Every neon atom has 10 protons… B. On P.T. – located right above the chemical symbol *Protons dictate the type of element we have* *Electrons always equal the # of protons* ...
electrons.
... number of protons in the nucleus The mass number of an element gives the number of protons and neutrons in the nucleus ...
... number of protons in the nucleus The mass number of an element gives the number of protons and neutrons in the nucleus ...
Central New Brunswick Academy
... surrounded yb a mostly empty space containing negative electrons. ...
... surrounded yb a mostly empty space containing negative electrons. ...
Chem 1411 Chapt2
... Ernest Rutherford discovered the proton by bombarding thin gold foil with alpha particles in 1919. James Chadwick discovered the neutron in 1932. Structure of the Atom ...
... Ernest Rutherford discovered the proton by bombarding thin gold foil with alpha particles in 1919. James Chadwick discovered the neutron in 1932. Structure of the Atom ...
Basic Chemistry notes
... ______________________—two or more like atoms combined chemically ______________________—two or more different atoms combined chemically ...
... ______________________—two or more like atoms combined chemically ______________________—two or more different atoms combined chemically ...
atom a very small particle that makes up most kinds of matters and
... exists in an electron cloud formation around an atom's nucleus ...
... exists in an electron cloud formation around an atom's nucleus ...
Lecture slides - e
... Covalent bonding occurs between atoms of non-metals. When the atoms form a bond they become lower in energy and the system is more stable. The energy saved by moving to a more stable situation is released as heat. For this reason bond formation is always exothermic, i.e. heat energy is released. ...
... Covalent bonding occurs between atoms of non-metals. When the atoms form a bond they become lower in energy and the system is more stable. The energy saved by moving to a more stable situation is released as heat. For this reason bond formation is always exothermic, i.e. heat energy is released. ...
Periodic table
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons in the nucleus), electron configurations, and recurring chemical properties. The table also shows four rectangular blocks: s-, p- d- and f-block. In general, within one row (period) the elements are metals on the lefthand side, and non-metals on the righthand side.The rows of the table are called periods; the columns are called groups. Six groups (columns) have names as well as numbers: for example, group 17 elements are the halogens; and group 18, the noble gases. The periodic table can be used to derive relationships between the properties of the elements, and predict the properties of new elements yet to be discovered or synthesized. The periodic table provides a useful framework for analyzing chemical behavior, and is widely used in chemistry and other sciences.Although precursors exist, Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table. Most of his predictions were proved correct when the elements in question were subsequently discovered. Mendeleev's periodic table has since been expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behavior.All elements from atomic numbers 1 (hydrogen) to 118 (ununoctium) have been discovered or reportedly synthesized, with elements 113, 115, 117, and 118 having yet to be confirmed. The first 94 elements exist naturally, although some are found only in trace amounts and were synthesized in laboratories before being found in nature. Elements with atomic numbers from 95 to 118 have only been synthesized in laboratories. It has been shown that einsteinium and fermium once occurred in nature but currently do not. Synthesis of elements having higher atomic numbers is being pursued. Numerous synthetic radionuclides of naturally occurring elements have also been produced in laboratories.