Description : (a) Explain the formation of ionic compound CaO with electron dot structure. Atomic number of calcium and oxygen are 20 and 8 respectively. (b) Name the constituent metals of bronze. -Chemistry
Last Answer : (b) Bronze is made up of copper and tin
Description : What is the relative atomic mass of calcium ?
Last Answer : The relative atomic mass of calcium is 40 .
Description : The soft silvery metalic element which ionizes easily when heated or exposed to light and is present in atomic clocks is – (1) Cerium (2) Cesium (3) Calcium (4) Californium
Last Answer : (2) Cesium Explanation: 1967, based on Einstein defining the speed of light as the most constant dimension in the universe, the International System of Units isolated two specific wave counts ... cesium has lowest ionization energy and hence it can show photoelectric effect to the maximum extent.
Description : Which of the following four elements has the largest atomic radius? Is it: w) strontium x) francium y) calcium z) bromine
Last Answer : ANSWER: X -- FRANCIUM
Description : The soft silvery metalic element which ionizes easily when heated or exposed to light and is present in atomic clocks is : (1) Cerium (2) Cesium (3) Calcium (4) Califonrium
Last Answer : Cesium
Description : There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes
Last Answer : Ans:(c)