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Where are the following?
Alkaline earth Metals, Halogens?, Alkali Metals?, Transition Metals?, Noble Gasses?Diatomics?
+1,+2 Cations? -1,-2 Cations?
Element(atom or ion)
Symbol Atomic Number
No. of Protons
No of Neutrons
Mass Number
No. of electrons
Charge
Magnesium ion
12 2+
Potassium ion
21 +1
Bromine atom
35
Try This!
Rubidium has two common isotopes, 8537Rb and
8737Rb. If the abundance of 85
37Rb is 72.2% and the amu is 85.2345 and the abundance of 87
37Rb is 27.8% and 87.1234 amu, what is the average atomic mass of rubidium?
Lets review
12) Which of the following is NOT part of Dalton’s atomic theory?a) all elements are composed of atomsb) atoms of the same element are identicalc) atoms are in constant motiond) when atoms combine they do so in simple whole number ratios
Which pair contains an element that is NOT diatomic? a) hydrogen and helium b) fluorine and chlorine c) bromine and iodined) oxygen and nitrogen
15) Which of the statements (a - c) is NOT true about a carbon-14 atom?
a) It contains 6 protons.b) It contains 6 neutrons.c) It contains 6 electrons.d) All of the above are true.
16) An ion always containsa) equal numbers of protons and electronsb) equal numbers of protons and neutronsc) unequal numbers of protons and neutronsd) unequal numbers of protons and electrons
Compare Rutherford’s model of the atom to Lord Kelvin’s model. Explain Rutherford’s reasoning in developing his model
Draw pictures that show the progression of the atom
thorughout time
Draw a picture of Carbon 14 atom
The first scientist to show that atoms emit tiny negative particles was
a. James Chadwick b. Ernest Rutherfordc. William Thomsond. J.J. Thomson
Isotopes are atoms that have the same atomic number but a different number ofa. Protons b. electrons c. neutronsd. croutons
Ions are created by a deficiency or surplus of:a. protons;b. electrons; c. neutrons
d. charge
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