(a) Which one of these diagrams shows the electronic structure of Aluminium (Al): (b) How many electrons are there in Aluminium? (c) How many protons and neutrons are there in Aluminum, if the mass number of Aluminium is approximately 27? 10. Periodic table shows the elements in order of their ……………………………………number. 11. Hydrogen forms positive …
Use “^” sign to show power.For example: if you want to write a5Write it as a^5
A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. Decomposition ReactionB. Single Displacement ReactionC. Double Displacement ReactionD. Synthesis Reaction A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. CH4 and CO2B. CH4 and O2C. CO2 and H2OD. O2 …
Also prepare a table of Elements with symbols that have different their Greek/Latin/German name.
Today, I am going to share my experience of IELTS –GENERAL TRAINING test. I will also share how you can get good score by following what I have done right and what I have failed to do. I teach at a school and spend my 8 hours staying at school. By the time I reach …
I think everyone should write book reviews just after they finish it whether online or in a notebook. Not later as we might forget most of the part of it. There are several reasons for that: First, you get a writing habit that is going to improve with every book. Second, summarizing the whole story …
1. The property of elements showing similar properties at a regular interval is called ………………………………. 2. Periodic table shows elements in order of their ……………………… number. 3. How much percentage of elements in a Periodic table are non-metals? (a) More than 80% (b) Less than 20% (c) 50% (d) 60% 4. Element that form + …
(a) The protons (b) The nucleus (c) The electrons 2. What is the charge on an electron? (a) One positive (b) No charge (c) One negative 3. Which of the three sub-atomic particles is the lightest? (a) The proton (b) The neutron (c) The electron 4. If atoms contain charged particles, why do they not …