Could someone help me answer these questions?

CONCEPTUAL Physical Science PRACTICE SHEET Chapter 12: Atoms and the Periodic Table Melting Points of the Elements There is a remarkable degree of organization in the periodic table. As discussed in your textbook, elements CONCEPTUAL InySIcal SCIENCE PRACTICE SHEET within the same atomic group (vertical column) share similar properties. Also, the chemical reactivity of an Chapter 12: Atoms and the Periodic Table element can be deduced from its position in the periodic table. Two additional examples of the periodic table's Subatomic Particles organization are the melting points and densities of the elements. The periodic table below shows the melting points of nearly all the elements. Note the melting points are not Three fundamental particles of the atom are the , and andomly oriented, but a few exceptions, eith gradually increase or decrease as you move in any particular direction. This can be clearly illustrated by color coding each eler coding each element according to its melting point. At the center of each atom lies the atomic - which consists of and Use colored pencils to color in each element according to its melting point. Use the suggest The atomic number refers to the Color lightly so that symbols and numbers are still visible. number of In the nucleus. All atoms of the same element have the Color Temperature Range. 'C Color Temperature Range. "C same number of , hence, the same atomic number. Molet Yellow Blue 200 3080 300 = TOO Isotopes are atoms that have the same number of but a different Cyan Red 2900 - 3500 Green number of An isotope is identified by Its atomic mass number, which is the total number of and in the nucleus. A carbon isotope -259 that has 6 and 6 is identified as carbon-12, where 12 is Melting Points of the Elements ( C) 2075 350 -210 28 6219 6240 the atomic mass number. A carbon isotope having 6 and 8 on the other hand, is carbon-14. 6 839 1581 1540 1830 1057 1262 1535 1458 1459 1053 29 98 9 1. Complete the following table: 1 Ke Number of... Isotope Electrons Protons Neutrons Hydrogen-1 Chlorine-36 17 Nitrogen-14 ACTIVEBES 1750 160 132 WHO AM WI WOD " 9 4 9 9 9 4 Potassium-40 19 Arsenic-75 33 Which elements have the highest melting points? Gold-197 118 2. Which results In a more valuable product - adding or substracting protons from Which elements have the lowest melting points? gold nuclei? Which atomic groups tend to go from higher to lower melting points reading from top to bottom? 3. Which has more mass, a helium atom or a neon (Identify each group by its group number.) atom? 4. Which has a greater number of atoms, a gram of 4. Which atomic groups tend to go from lower to higher melting points reading from top to bottom? helium or a gram of neon? Chapter 13: The Atomic Nucleus and Radioactivity Radioactivity-continued ONCEPTUAL Physical Science PRACTICE SHEET Chapter 13: The Atomic Nucleus and Radioactivity Draw in a decay-scheme diagram below, similar to Figure 13.17 in your text. In this case you begin Radioactivity at the upper right with U-235 and end up with a different Isotope of lead. Use the table at the left and identify each element in the series by its chemical symbol. 1. Complete the following statements. a. A lone neutron spontaneously decays into a proton plus an PHYSICS 235 SIGH: Step Particle Emitted b. Alpha and beta rays are made of streams of particles, whereas Alpha Beta gamma rays are streams of 231 Alpha Alpha Beta C. An electrically charged atom is called en Alpha Alpha 227 1, Different hernically identical but differ In the number Alpha of neutrons in the nucleus. Beta Alpha 11 Bola 22 Stable 1. if the amount of a ce weeks the amount remaining should be 219 g. Water from a natural hot spring is warmed by inside the earth. ATOMIC MASS 215 The gas in the little girl's balloon is made up of former alpha and beta particles produced by radioac live decay. a. If the mixture is electrically neutral, how many more beta 211 particles than alpha particles are in the balloon? Ace Vedo 207 b, Why is your answer not "same"? 203 c, Why are the alpha and beta particles no longer harmful to the child? 81 82 83 84 85 86 87 88 89 90 91 92 ATOMIC NUMBER What isotope is the final product? _ d. What element does this mixdurs make