What is true about the valance electrons of all of the elements in a group on the periodic table? They are equal to the group A number. What are valance electrons? The electrons on the outer most shell, they are available for bondingвЂ¦Дў4. What is the energy of a photon of light with a frequency of 6.2 x 1014 Hz? Perform the following calculations: What is the wavelength of a wave with a frequency of 7.21 x 1014s-1? c = О» (3.00 x 108 m)(s) = 0.000000416 m OR 416 nm f (s)(7.21 x 1014) A wave has a wavelength of 3.21 x 10-6. What is c in this formula (always)? Look at your вЂњconstants and conversionsвЂќ on your formula chart!!! The speed of light!Дў1. О» to solve for(hintвЂ¦remember the triangle?) F = C О» О» = C fДў0.How would you rearrange the following equation: c = f Green light of red light: green light ROY G BIV (Longest wavelength to shortest)ДЎ9.Blue light or orange light: blue light.Which of the following has the largest frequency/ most energy? (Be able to answer this type of question for any of the colors.) Purple light or yellow light: Yellow light ROY G BIV (Longest wavelength/Lowest energy to shortest wavelength/highest energy)ДЎ8.Which of the following has the largest wavelength /least energy? (Be able to answer this type of question for any of the colors.) Correctly order the following electromagnetic waves from most to least energy: gamma ray, x-ray, microwave, UV, visible, infrared, radioДЎ7. What is the average atomic mass of Mg if 78.99% of Mg atoms are isotopes with a mass of 23.9850 amu, and 21.01% have a mass of 24.5 amu?. P3-_gained 3 e-_(Phosphorus gained or lost electrons) Now has 18 e-ДЎ5.Mg2+ _lost 2 e-_ (magnesium gained or lost electrons).

How many electrons are indicated by the following symbols? Subatomic Particle DiscoveredДћxperiment Thomson: electron Rutherford: protonДЎ4. Name of Model: Dalton : Billiard ball Thomson: Plum Pudding Rutherford : NuclearДЎ2-13. Thomson proved that there were charged particles that made up parts of the atom when he discovered the electronвЂ¦Д©-11.Dalton said atoms were solid spheres, like pool balls-indivisibleвЂ¦.What part of DaltonвЂ™s atomic theory was disproved by ThomsonвЂ™s experiment? What is the average atomic mass of all of the isotopes of this element? ДЁ.An isotope has 15 protons, 16 neutrons, and 15 electrons. In the element symbol Carbon-14, the number is the : mass number.Д§. Our table now=MosleyвЂ™s ordered elements by atomic NUMBERД¦.1st table=Medeleev made and ordered elements by average atomic MASS.How has the periodic table developed?(how does MedeleevвЂ™s table compare to MosleyвЂ™s) Classify the following properties as either an intensive property and an extensive property. Classify each of the following as a physical or chemical change: Д¤. Classify the following substances as pure or mixtures: ДЈ. Classify each of the following as a homogeneous or heterogeneous mixture: Дў.

Chemistry 1st semester review