16/12/2019Atoms, Compounds and Mixtures (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Atoms, Compounds and Mixtures (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. Which component of atom is negatively chargedisotronneutronprotonelectron2. The chemical symbol of zinc isZnZZcZi3. How many protons are there in an atom of sodium which has an atomic number of 11 and a mass number of 23?112334124. Where two or more substances are mixed together but not chemically combined, this substance is calleda mixturean atoma compounda molecule5. "Sub-atomic particle" is the name given tothe tiny particles found outside the nucleus.the tiny particles found inside the nucleus.the tiny particles found inside an atom.particles found in a nuclear submarine.6. The masses of sub-atomic particles are usually measured inkilograms.ounces.grams.atomic mass units.7. An atom of nitrogen has 7 protons and 7 neutrons in its nucleus. What is its electronic structure?5,22,8,42,52,78. The period in which an element is located gives usthe electronic configuration of that element.the number of electrons in its outer shell.the number of neutrons in that element.the number of electron shells that the electron has.9. How many neutrons does the element of atomic number 1 and mass number 1 have?02None of other mentioned values110. The following are products of fractional distillation of crude oil exceptkerosenebitumennaphtaoctane11. The chemical symbol of helium isHmHEHeH12. If an element has an atomic number of 9 and a mass number of 19, then, which of the following statements is INCORRECT?There are 9 electrons orbitting around its nucleus.Its got 10 electrons and 9 neutrons.There are 10 neutrons in its nucleus.Its got 9 protons and 9 electrons.13. Which particles are to be found in the nucleus of an atom?Protons, neutrons and electrons. ? ? ?Neutrons and protons.Electrons and neutrons.Neutrons only.14. Calcium is in group II (2) of the Periodic Table. How many electrons does it have in its outer shell?42201115. Study the four diagrams representing different substances. Which two of these diagrams represents elements?B and CA and BC and DA and D16. The chemical symbol of silver isAlAuAdAg17. Which of the following sets of substances represents mixtures only?Air, blood and sodium chlorideBrass, seawater and airGold, carbon and airOrange juice, sodium and hydrogen18. Which one of the following elements is used in party balloons?HeliumNitrogenOxygenNeon19. Water is a compound made up of two different elements. These elements areHydrogen and oxygenSodium and chlorineHydrogen and nitrogenOxygen and iro20. The chemical symbol for oxygen isNYXO21 out of 20Time is Up!
