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Where are the following?

Published byElfreda Goodwin Modified over 9 years ago

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Presentation on theme: "Where are the following?"— Presentation transcript:

1 Where are the following?
Alkaline earth Metals, Halogens?, Alkali Metals?, Transition Metals?, Noble Gasses? Diatomics? +1,+2 Cations? -1,-2 Cations?

2

3 Try This! 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

4 Rubidium has two common isotopes, 8537Rb and 8737Rb
Rubidium has two common isotopes, 8537Rb and 8737Rb. If the abundance of 8537Rb is 72.2% and the amu is and the abundance of 8737Rb is 27.8% and amu, what is the average atomic mass of rubidium?

5 Lets review 12) Which of the following is NOT part of Dalton’s atomic theory? a) all elements are composed of atoms b) atoms of the same element are identical c) atoms are in constant motion d) when atoms combine they do so in simple whole number ratios

6 Which pair contains an element that is NOT diatomic?
a) hydrogen and helium b) fluorine and chlorine c) bromine and iodine d) oxygen and nitrogen

7 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.

8 16) An ion always contains
a) equal numbers of protons and electrons b) equal numbers of protons and neutrons c) unequal numbers of protons and neutrons d) unequal numbers of protons and electrons

9 Compare Rutherford’s model of the atom to Lord Kelvin’s model
Compare Rutherford’s model of the atom to Lord Kelvin’s model. Explain Rutherford’s reasoning in developing his model

10 Draw pictures that show the progression of the atom thorughout time

11 Draw a picture of Carbon 14 atom

12 The first scientist to show that atoms emit tiny negative particles was
a. James Chadwick b. Ernest Rutherford c. William Thomson d. J.J. Thomson

13 Isotopes are atoms that have the same atomic number but a different number of
a. Protons b. electrons c. neutrons d. croutons

14 Ions are created by a deficiency or surplus of:
a. protons; b. electrons; c. neutrons d. charge

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