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