What is the “Prove It” Test

What is the â€Å"Prove It† Test You’ve been invited to take a Kenexa â€Å"Prove It† Test, which means it’s time to put your money where your mouth is in terms of your Microsoft Office skills. This test will help you demonstrate your abilities with programs like Word and Excel, as well as identifying any particular strengths or weaknesses. What’s on ItThe aim of this test is to â€Å"prove† that you have the skills and ability to use Microsoft Office at your new job without too much guidance or prep. Potential employers want to get a sense of what you know and whether or not you’ll be able to hit the ground running with administrative skills as soon as you start.For example, in the past, the Excel exam has tested the following skills:Opening a workbookInserting/deleting columns and rowsChanging font styles/sizesFormatting cells as currency/decimalsUsing the sum/average functionsAligning textSaving/printingAligning textCreating bordersRenaming a WorksheetChanging column widt hInserting a chart or worksheetWrapping textMerging cellsSorting by different valuesAdding headers/footersAs you can see, this is a basic overview of all the things you can do within the program. Make sure you have a good sense of all these basics, and more. The aim is not to be tentative about anything when you go in on test day- you want to be able to complete every request without much pause or confusion.How to PrepareIt can increase your confidence and help you practice. Even if you’re sure you know how to use Word, Excel, and Powerpoint, you need to make sure you don’t panic and forget everything under the pressure of an official test of your skills.Use a site like JobTestPrep to prepare with free sample questions and tips for test-taking. Or opt for a Kenexa PrepPack in which you can take a variety of tests and assessments online- with timed tests and score reports and everything. The detailed answer explanations are particularly useful for cementing concepts tha t you might not yet quite fully understand.Finally, check out this collection of YouTube Microsoft tutorials for all areas of Office. Whatever you need, that page has you covered.The ExamOnce you get to the actual exam, know that you’ll have 14 days to take your assessments. The length of each varies- from 15-30 minutes for non-technical assessments, to 45-60 minutes for more technical ones. The assessments are not timed, but this is the average amount of time needed to take them.You can’t skip any questions or return to previous screens to change your answers. But you can take the assessment again- as many times as you wish. Employers will not have access to your results, though a staffing agency might ask you to take one of these tests to determine what you’re best at- which skills on your resume are provable, and where you might match best.Good luck on your test! May you get the job you seek and prove you have what it takes.

How to Calculate Atomic Mass

How to Calculate Atomic Mass You may be asked to calculate atomic mass in chemistry or physics. There is more than one way to find atomic mass. Which method you use depends on the information youre given. First, its a good idea to understand what exactly, atomic mass means. What Is Atomic Mass? Atomic mass is the sum of the masses of the protons, neutrons, and electrons in an atom, or the average mass, in a group of atoms. However, electrons have so much less mass than protons and neutrons that they dont factor into the calculation. So,  the atomic mass is the sum of the masses of protons and neutrons. There are three ways to find atomic mass, depending on your situation. Which one to use depends on whether you have a single atom, a natural sample of the element, or simply need to know the standard value. 3 Ways to Find Atomic Mass The method used to find atomic mass depends on whether youre looking at a single atom, a natural sample, or a sample containing a known ratio of isotopes: 1) Look Up Atomic Mass on the Periodic Table If its your first encounter with chemistry, your instructor will want you to learn how to use the periodic table to find the atomic mass (atomic weight) of an element. This number usually is given below an elements symbol. Look for the decimal number, which is a weighted average of the atomic masses of all the natural isotopes of an element. Example:  If you are asked to give the atomic mass of carbon, you first need to know its element symbol, C. Look for C on the periodic table. One number is carbons element number or atomic number. Atomic number increase as you go across the table. This is not the value you want. The atomic mass or atomic weight is the decimal number, The number of significant figures varies according to the table, but the value is around 12.01. This value on a periodic table is given in atomic mass units or amu,  but for chemistry calculations, you usually write atomic mass in terms of grams per mole or g/mol. The atomic mass of carbon would be 12.01 grams per mole of carbon atoms. 2) Sum of Protons and Neutrons for a Single Atom To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. The atomic mass of the atom is the mass of the protons plus the mass of the neutrons, 6 7, or 13. 3) Weighted Average for All Atoms of an Element The atomic mass of an element is a weighted average of all the elements isotopes based on their natural abundance. It is simple to calculate the atomic mass of an element with these steps.Typically, in these problems, you are provided with a list of isotopes with their mass and their natural abundance either as a decimal or percent value. Multiply each isotopes mass by its abundance. If your abundance is a percent, divide your answer by 100.Add these values together. The answer is the total atomic mass or atomic weight of the element. Example: You are given a sample containing 98% carbon-12 and 2% carbon-13. What is the relative atomic mass of the element? First, convert the percentages to decimal values by dividing each percentage by 100. The sample becomes 0.98 carbon-12 and 0.02 carbon-13. (Tip: You can check your math by making certain the decimals add up to 1. 0.98 0.02 1.00). Next, multiply  the atomic mass of each isotope by the proportion of the element in the sample: 0.98 x 12 11.760.02 x 13 0.26 For the final answer, add these together: 11.76 0.26 12.02 g/mol Advanced Note: This atomic mass is slightly higher than the value given in the periodic table for the element carbon. What does this tell you? The sample you were given to analyze contained more carbon-13 than average. You know this because your relative atomic mass is higher than the periodic table value, even though the periodic table number includes heavier isotopes, such as carbon-14. Also, note the numbers given on the periodic table apply to the Earths crust/atmosphere and may have little bearing on the expected isotope ratio in the mantle or core or on other worlds. Over time, you may notice the atomic mass values listed for each element on the periodic table may change slightly. This happens when scientists revise the estimated isotope ratio in the crust. In modern periodic tables, sometimes a range of values is cited rather than a single atomic mass. Find More Worked Examples