Objectives-There is often much confusion between goals and objectives. Whereas as a goal is a description of a destination, an objective is a measure of the progress that is needed to get to the destination. The following table serves to illustrate the difference between goals and objectives.
Group VIIIA (new Group 18) are called the noble gases. They used to be called the inert gases, but Neil Bartlett at UC, Berkeley showed that the noble gases could be made into compounds. Their reactivity is minimal. The noble gases are; Helium, Neon, Argon, Krypton, Xenon, and Radon. Radon is toxic, as it is radioactive. The other elements that are gases at room temperature are: fluorine, F2; chlorine, Cl2; oxygen, O2; nitrogen, N2; and hydrogen, H2. All these gases are diatomic. The halogens, fluorine and chlorine, are highly reactive, and very toxic. Oxygen and nitrogen are reactive, or can be made to react. They are not toxic per se. Hydrogen is, of course, very reactive. Hydrogen and nitrogen are not toxic, but they will suffocate you, as would the noble gases, if you ingested pure forms of them, and your oxygen supply was quenched.
Chemical Hazards The word toxic means poison. Poisoncauses illness and sometimes death.Toxicity refers to a chemicalâs ability toharm living things (you).These harmful chemicals, called toxins,affect various parts of the body, such as thenervous system, the heart, the lungs, theeyes, and the skin.ven with this short amount oftime, students come out with a great understanding of WHMIS.As new students may enter your facility after your lessons on WHMIS, thisbooklet and assignments may allow students to progress by themselves, if needbe, with little intervention by the teacher.