MIDTERM EXAM – JANUARY, 2003
... 76. The alkali metals and alkaline earth metals occupy the ______________ block of the periodic table 77. The name of the group which contains fluorine, chlorine, bromine, iodine, and astatine is 78. When they react chemically, the halogens (Group VII or 17) change in what way? Naming, Bonding and W ...
... 76. The alkali metals and alkaline earth metals occupy the ______________ block of the periodic table 77. The name of the group which contains fluorine, chlorine, bromine, iodine, and astatine is 78. When they react chemically, the halogens (Group VII or 17) change in what way? Naming, Bonding and W ...
Atoms and Isotopes Worksheet
... 3. The atomic masses of two isotopes of Cobalt are 59 and 60. If Cobalt has 27 electrons, what is the number of protons and neutrons in each isotope? ...
... 3. The atomic masses of two isotopes of Cobalt are 59 and 60. If Cobalt has 27 electrons, what is the number of protons and neutrons in each isotope? ...
Notes - Zion Central Middle School
... Atoms are made up of subatomic particles—protons, neutrons and electrons. o Protons and neutrons are in the nucleus of an atom. o Electrons occupy orbitals or electron clouds that surround the nucleus. Protons are found in the nucleus of atoms and have an electric charge of +1. Neutrons are found in ...
... Atoms are made up of subatomic particles—protons, neutrons and electrons. o Protons and neutrons are in the nucleus of an atom. o Electrons occupy orbitals or electron clouds that surround the nucleus. Protons are found in the nucleus of atoms and have an electric charge of +1. Neutrons are found in ...
Document
... An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element. ...
... An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element. ...
Early Models of the Atom Worksheet
... e) Proposed the “billiard ball” model of the atom. f) All matter is made of small particles called atoms. g) All atoms of the same element are identical. h) Atoms contain negatively charged particles. i) The nucleus contains positively charged particles called protons and particles with no electric ...
... e) Proposed the “billiard ball” model of the atom. f) All matter is made of small particles called atoms. g) All atoms of the same element are identical. h) Atoms contain negatively charged particles. i) The nucleus contains positively charged particles called protons and particles with no electric ...
30-2 Ch 3 Test Review Atomic Theory DEBRIEF KEY
... Which color (end) of the spectrum has the highest energy? VIOLET/PURPLE ...
... Which color (end) of the spectrum has the highest energy? VIOLET/PURPLE ...
NOTES – 14.1 – Structure of the Atom (FPS3)
... when its total electric charge is zero. Atoms are normally neutral, but the things that make them up are charged. ...
... when its total electric charge is zero. Atoms are normally neutral, but the things that make them up are charged. ...
ATOMIC STRUCTURE AND MOLECULAR BONDING
... hold up to 2 electrons. The elements of the second row of the periodic table have 2 electrons in an inner shell and can hold up to 8 electrons in a second shell. The elements of the third row of the periodic table hold 2 electrons in their inner shell, 8 electrons in their second shell, and up to 8 ...
... hold up to 2 electrons. The elements of the second row of the periodic table have 2 electrons in an inner shell and can hold up to 8 electrons in a second shell. The elements of the third row of the periodic table hold 2 electrons in their inner shell, 8 electrons in their second shell, and up to 8 ...
Masses of Atoms - Pelham City Schools
... masses of the elements surrounding these blank spaces. ...
... masses of the elements surrounding these blank spaces. ...
The Atom - Magoffin County Schools
... has is known as it’s ATOMIC NUMBER. • The AN tells which of the 109 ELEMENTS an atom belongs to. ...
... has is known as it’s ATOMIC NUMBER. • The AN tells which of the 109 ELEMENTS an atom belongs to. ...
4. - period2chem
... point to identify the areas on which you need to spend more study time. For those areas, go back to homework assignments, quizzes, and reviews to practice more problems. I would also recommend going through all of your tests since these questions are only samples and do not include specific examples ...
... point to identify the areas on which you need to spend more study time. For those areas, go back to homework assignments, quizzes, and reviews to practice more problems. I would also recommend going through all of your tests since these questions are only samples and do not include specific examples ...
Ch 4 Review
... ____ 17. How are the elements in the periodic table arranged? a. in order of atomic charge c. in order of subatomic particles b. in order of atomic number d. in alphabetical order ____ 18. The attractive force between oppositely charged ions that result from the transfer of electrons from one atom t ...
... ____ 17. How are the elements in the periodic table arranged? a. in order of atomic charge c. in order of subatomic particles b. in order of atomic number d. in alphabetical order ____ 18. The attractive force between oppositely charged ions that result from the transfer of electrons from one atom t ...
+ 2 HCL(aq) CaCl2(aq) + H2O(l) + CO2(g)
... Subscript: A number that represents how many atoms of an element are in a compound. Compound: A substance made of the combined atoms of two or more elements. Chemical Formula: States what elements a compound contains and the exact number of atoms of these elements. Oxidation Number: positive or nega ...
... Subscript: A number that represents how many atoms of an element are in a compound. Compound: A substance made of the combined atoms of two or more elements. Chemical Formula: States what elements a compound contains and the exact number of atoms of these elements. Oxidation Number: positive or nega ...
Chapter 8 and 10: Structure of the Atom
... 60. Explain how a negative ion is formed. Explain how a positive ion is formed. 61. The element barium has an atomic number of 56, and a selected Ba +2 ion has a mass number of 137. How many protons, neutrons, and electrons are in the Ba+2 ion? 62. What are the three isotopes of hydrogen and what is ...
... 60. Explain how a negative ion is formed. Explain how a positive ion is formed. 61. The element barium has an atomic number of 56, and a selected Ba +2 ion has a mass number of 137. How many protons, neutrons, and electrons are in the Ba+2 ion? 62. What are the three isotopes of hydrogen and what is ...
unit 4 * organization of matter
... classified according to a horizontal axis and a vertical axis The horizontal axis : The elements are placed in order of increasing atomic number The atomic number is the number of protons Ex. 1: Hydrogen ( 1 proton ) Ex. 2: Helium ( 2 protons ) Each table row is called A PERIOD ...
... classified according to a horizontal axis and a vertical axis The horizontal axis : The elements are placed in order of increasing atomic number The atomic number is the number of protons Ex. 1: Hydrogen ( 1 proton ) Ex. 2: Helium ( 2 protons ) Each table row is called A PERIOD ...
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.