Chapter 1, Problem 4P

For the first and third blank the options are could be or cannot be. For the second and fourth blank the options are definite proportions or multiple proportions.

The firs 20 Periodic table elements description.

LEARNING TASK 1: Complete the following sentences by filling in the appropriate word from the list below. Write your answer in the box below. Do not forget to turn in/ hand in your work. Thanks Periodic Table Compound Symbols Carbon Element Pure Letters Properties Atomic Number Mendeleev Carbon Dioxide Metal 1. cannot be separated by physical or chemical means. 2.Elements are abbreviated with which consist of one or two 3. Elements are organized on the according to their 4. Two or more elements chemically combined make up a 5.. is an example of an element and is an example of a compound. 6. Elements and compounds are called have a unique set of chemical and physical substances because they

I Review | Constants | Periodic Table The following diagram(Figure 1) is a representation of 20 atoms of a fictitious element, which we will call nevadium (Nv). The red spheres are 203 Nv, and the blue spheres are 295 Ny Assuming that this sample is a statistically representative sample of the element, calculate the percent abundance of each element. Express your answers as integers. Enter your answers numerically, separated by a comma. Figure 1 of 1 ΑΣφ ? % abundance 293 Nv. % abundance 295 Ny = Submit Request Answer Part B Complete previous part(s) Provide Feedback Next >

Row 2: Your answer is incorrect. olo There are only two naturally-occuring stable isotopes of boron, the masses of which are listed in the table below. Use whatever data you need from the ALEKS Periodic Table to calculate the natural abundance of each isotope and complete the table. 10. 11 Ar Round your entry for "B to 3 significant digits and your entry for "B to 3 significant digits. mass natural isotope x10 (amu) abundance 10B % 10.013 11.009

https://bbhosted.cuny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_1347846_1&course_id=_12509.. * Question Completion Status: QUESTION 1 An element is a substance that is made of a single type of atom. All atoms of the same element will have the same physical and chemical properties. O both sentences are true O both sentences are false O the first sentence is true: the second is false the first sentence is false; the second is true QUESTION 2 Each element: O has unique physical properties O has unique chemical properties O is made of a single type of atom O all of the above. QUESTION 3 10 This is the correct sorting of major elements in the human body from the most abundant (in percentage) to the least abundant: O Oxygen; carbon; hydrogen; nitrogen O Oxygen; hydrogen; carbon; nitrogen O Carbon; oxygen; hydrogen; nitrogen O Carbon; hydrogen; oxygen; nitrogen Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers search (72…

What is the chemical formula for a molecular model with 2 nitrogen atoms and 4 hydrogen atoms? Also what is the chemical formula for a molecular model with 2 oxygen atoms and 2 hydrogen atoms? I'm referring to C and D.

II. COMPLETING THE TABLE. Fill in the gaps in the following table. Follow the number sequence indicated in the parenthesis,( ), to answer the missing data. (10 points) Number of neutrons Number of electrons (3) 88 (8) (10) Number of Atomic number 30 Mass number (1) 226 Atom protons (2) (5) (7) 35 35 Zn Ra Fes (4) 26 (6) (9) 45 56 Br 35 80

Silver has two naturally occurring isotopes, 107Ag (isotopic mass 106.90509 amu) and 109Ag (isotopic mass 108.90476 amu). If silver has an atomic mass of 107.87 amu, what is the percent abundance of 109Ag isotope? (Attention: Show the equation with the variable x to gain the credit by using the Function button of "Insert Math Equation" in the panel above. All you need to type in the box below are the equation and the result. Calculation result without the equation will only give you no more than 30% of the credit.)