PART -B II. Short Answer 1. Write the symbol for Barium, Beryllium, Bismuth and Bromine. 2. Classify the elements based on their properties. 3. Mercury is used in thermometers. Why? 4. What are the constituents of bleaching powder? 5. Mention the uses of metalloids.
Answers
Answer:
1. symbol for barium - Ba
Berylium - Be
Bismuth- Bi
Explanation:
Answer:
1]answer:
ba, be, bi, br.
2]answer:
Elements are typically classified as either a metal or nonmetal, but the dividing line between the two is fuzzy. Metal elements are usually good conductors of electricity and heat. The subgroups within the metals are based on the similar characteristics and chemical properties of these collections.
The English chemist John Newlands (1838–1898), hypothesizing that the chemistry of the elements might be related to their masses, arranged the known elements in order of increasing atomic mass and discovered that every seventh element had similar properties
Elements in the same group of the periodic table have similar chemical properties. Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals. Groups are numbered 1–18 from left to right.
3]anwer:
yes, mercury used in thermometers..because
Most metals are good conductors of heat and they are solids at room temperature. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion.
Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.